Snowmobile Engine
Snowmobile Engine Parts & Components at JJ Motorsports
Revamp your snowmobile engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, top-end kits, pistons, and seals using high-tech materials for superior reliability and performance in extreme cold. Compatible with engines from Sachs, JLO, Hirth, and more, these components ensure leak-free operation, better compression, and longevity for Ski-Doo, Polaris, Arctic Cat, and Yamaha models during trail rides or racing.
Shop trusted brands like Winderosa for gasket sets and Maxima Racing Oils for lubricants. Explore related categories such as snowmobile air and fuel systems for tuning or snowmobile drivetrain for full powertrain upgrades.
Top Snowmobile Engine Products
- WINDEROSA Complete Gasket Set 711063 – High-tech materials for reliable sealing.
- WINDEROSA Complete Gasket Set 711063C – Enhanced for performance engines.
- WINDEROSA Complete Gasket Set 711063D – Durable for extreme conditions.
- WINDEROSA Complete Gasket Set 711109A – Comprehensive top-end rebuild kit.
- WINDEROSA Complete Gasket Set 711020 – Affordable and reliable option.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Wiseco Piston Kit for 1994-1997 Polaris 440 XCR 440 XCR SP 440 XC 440 SK1178
WISECO
$334.95The Wiseco Piston Kit delivers the durability and thermal stability your 1994-1997 Polaris 440 needs to handle sustained high-RPM performance. Built from high-silicone forged bar stock, this complete top-end assembly minimizes expansion under extreme...SK1178- SKU:
- SK1178
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- MODEL:
- PRO-LITE
- SKIRT COATING:
- NON-COATED
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- KIT
- DISPLACEMENT:
- 439 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- SNOW
- STROKE LENGTH METRIC:
- 60.00 MM
- BORE SIZE METRIC:
- 68.25 MM
- COOLING SYSTEM:
- LIQUID COOLED
- PISTON DIAMETER METRIC:
- 68.12 MM
- PRODUCT NAME:
- REBUILD KIT
$334.95Qty in Cart: 0Quantity:Price:$334.95Subtotal: -
Wiseco Piston Kit Arctic Cat Wildcat 700 1991-1996 SK1195
WISECO
$389.95A 2-cycle top-end rebuild demands precision components that won't compromise engine integrity or performance. The Wiseco SK1195 piston kit delivers everything you need in one package—forged pistons, matched rings, wrist pins, and gaskets—eliminating the...SK1195- SKU:
- SK1195
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 80.89 MM
- RIDING STYLE:
- SNOW
- SKIRT COATING:
- NON-COATED
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- COOLING SYSTEM:
- LIQUID COOLED
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE - OVERSIZE:
- +3,00 MM
- BORE SIZE METRIC:
- 78.00 MM
- DISPLACEMENT:
- 701 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
$389.95Qty in Cart: 0Quantity:Price:$389.95Subtotal: -
Wiseco Piston Kit Arctic Cat F7 Firecat 2003-2006 2410M07970
WISECO
$188.95When your Arctic Cat F7 Firecat is pushing hard on the trail or at the track, a worn piston compromises combustion efficiency and power delivery. The Wiseco 2410M07970 restores peak performance with a high-silicon alloy construction that handles...2410M07970- SKU:
- 2410M07970
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 698 CC
- PISTON DIAMETER METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 79.70 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 70.00 MM
- RIDING STYLE:
- SNOW
$188.95 -
Wiseco Piston Kit 77mm Oversize for Ski-Doo MX Z 600 1999-2001 2411M07700
WISECO
$189.95When your Ski-Doo MX Z 600 needs a fresh top-end rebuild, a quality piston kit is non-negotiable—it directly impacts power delivery, engine longevity, and reliability on both groomed trails and aggressive terrain. The Wiseco 77mm oversize piston delivers...2411M07700- SKU:
- 2411M07700
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- BORE SIZE METRIC:
- 77.00 MM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH METRIC:
- 65.80 MM
- PISTON DIAMETER METRIC:
- 76.86 MM
- RIDING STYLE:
- SNOW
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 613 CC
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
$189.95Qty in Cart: 0Quantity:Price:$189.95Subtotal: -
Wiseco Piston Assembly 72mm Bore for 1989-2006 Polaris Indy 500 2345M07200
WISECO
$164.95When your Polaris Indy 500 demands peak performance, a worn or damaged piston compromises both power delivery and engine reliability. The Wiseco Piston Assembly restores your engine to OEM specifications with superior high-silicon alloy construction that...2345M07200- SKU:
- 2345M07200
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 72.00 MM
- DISPLACEMENT:
- 488 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- PRO-LITE
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 71.87 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- SNOW
- STROKE LENGTH METRIC:
- 60.00 MM
- SKIRT COATING:
- ARMORGLIDE®
$164.95Qty in Cart: 0Quantity:Price:$164.95Subtotal: -
Wiseco Piston Kit Arctic Cat Thundercat 1993-1997 2349M07650
WISECO
$163.69If you're running a high-performance 2-cycle build in your Arctic Cat Thundercat, piston quality directly impacts reliability and power delivery under sustained load. Wiseco's high-silicone bar stock forging resists thermal expansion better than stock...2349M07650- SKU:
- 2349M07650
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- DISPLACEMENT:
- 896 CC
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 76.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- RIDING STYLE:
- SNOW
- STROKE LENGTH METRIC:
- 65.00 MM
$163.69Qty in Cart: 0Quantity:Price:$163.69Subtotal: -
Wiseco Piston Kit Standard Bore 67.75mm 1991-1997 Polaris 650 Indy RXL 2346M06775
WISECO
$149.95When you're pushing a 650 Indy RXL to its limits—whether on the trail or at the line—piston failure isn't an option. The Wiseco 2346M06775 delivers the strength and precision you need to maintain reliable power delivery across extended seasons of hard...2346M06775- SKU:
- 2346M06775
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PISTON DIAMETER METRIC:
- 67.62 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- DISPLACEMENT:
- 649 CC
- RIDING STYLE:
- SNOW
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 67.75 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 648 CC
- STROKE LENGTH METRIC:
- 60.00 MM
$149.95Qty in Cart: 0Quantity:Price:$149.95Subtotal: -
Wiseco Piston Kit 72.5mm Bore 1986-2006 Polaris Storm 2355M07250
WISECO
$163.69If you're rebuilding your Polaris Storm engine or pushing it to its limits on the trail, a quality piston kit is non-negotiable—it's the foundation of reliable power delivery under extreme conditions. The Wiseco 72.5mm bore piston handles both aggressive...2355M07250- SKU:
- 2355M07250
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- SNOW
- STROKE LENGTH METRIC:
- 65.00 MM
- BORE SIZE METRIC:
- 72.50 MM
- DISPLACEMENT:
- 805 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 72.38 MM
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- KIT
$163.69Qty in Cart: 0Quantity:Price:$163.69Subtotal: -
Wiseco Piston Ski-Doo Formula MX 1987-1995 2312M07000
WISECO
$149.95A worn or damaged piston directly impacts engine compression, power delivery, and reliability—especially critical if you're pushing your Ski-Doo Formula MX hard on the trail or in competition. The Wiseco 2312M07000 restores full performance with a...2312M07000- SKU:
- 2312M07000
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- DISPLACEMENT:
- 469 CC
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- SNOW
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 69.92 MM
- STROKE LENGTH METRIC:
- 61.00 MM
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$149.95Qty in Cart: 0Quantity:Price:$149.95Subtotal: -
Wiseco Piston Kit 85mm Bore Arctic Cat F8 2007-2009 SK1374
WISECO
$444.95If you're pushing your Arctic Cat F8 to its limits, you need pistons engineered to handle extreme temperatures and sustained high RPMs without failure. Wiseco's forged piston kit delivers the strength and thermal stability required for serious snowmobile...09030595- SKU:
- 09030595
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- BORE SIZE METRIC:
- 85.00 MM
- RIDING STYLE:
- SNOW
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 794 CC
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- COOLING SYSTEM:
- LIQUID COOLED
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- PISTON DIAMETER METRIC:
- 84.87 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 70.00 MM
- TYPE:
- TOP END
$444.95Qty in Cart: 0Quantity:Price:$444.95Subtotal: -
Wiseco Piston Kit 1998-2006 Polaris 500 Liquid Cooled 72.5mm Bore SK1370
WISECO
$384.95When your Polaris 500 liquid-cooled engine demands a top-end rebuild, the Wiseco Piston Kit SK1370 delivers the precision engineering and durability you need to stay competitive. High-silicone forged construction minimizes thermal expansion and resists...09030598- SKU:
- 09030598
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- BORE - OVERSIZE:
- +0,50 MM
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 72.00 MM
- COOLING SYSTEM:
- FAN COOLED
- DISPLACEMENT:
- 496 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- TYPE:
- TOP END
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- SNOW
- STROKE LENGTH METRIC:
- 60.00 MM
- PISTON DIAMETER METRIC:
- 72.37 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
$384.95Qty in Cart: 0Quantity:Price:$384.95Subtotal: -
Wiseco Piston Kit Ski-Doo 550F 2003-2015 SK1376
WISECO
$404.95Factory pistons wear, wear quickly under sustained power demands—particularly in forced-induction or heavily modded sleds. The Wiseco SK1376 kit replaces worn internals with forged-aluminum pistons engineered to handle extreme combustion pressures while...09030607- SKU:
- 09030607
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- COOLING SYSTEM:
- FAN COOLED
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- SNOW
- STROKE LENGTH METRIC:
- 61.00 MM
- BORE - OVERSIZE:
- +0,50 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 76.00 MM
- DISPLACEMENT:
- 561 CC
- PISTON DIAMETER METRIC:
- 76.36 MM
- PRODUCT NAME:
- REBUILD KIT
$404.95Qty in Cart: 0Quantity:Price:$404.95Subtotal: -
Wiseco Piston Kit Yamaha Mountain Max 600 2000-2002 SK1332
WISECO
$504.95When you're rebuilding a top end, tolerance stacking and material quality determine whether your engine will be reliable or become a recurring expense. The Wiseco Piston Kit SK1332 is engineered specifically for the Yamaha Mountain Max 600 to deliver the...09030613- SKU:
- 09030613
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON DIAMETER METRIC:
- 64.89 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 65.00 MM
- COOLING SYSTEM:
- LIQUID COOLED
- DISPLACEMENT:
- 593 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- STROKE LENGTH METRIC:
- 59.60 MM
- TYPE:
- TOP END
- RIDING STYLE:
- SNOW
$504.95Qty in Cart: 0Quantity:Price:$504.95Subtotal: -
EPI Oil Cap - Ski-Doo EPISOC4
EPI
$8.99A worn or damaged oil cap compromises engine sealing and allows contaminants to enter your fuel system, risking performance degradation and costly repairs. The EPI Oil Cap for Ski-Doo delivers OEM-equivalent sealing reliability with an integrated gasket...07100207- SKU:
- 07100207
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BASE COLOR:
- BLACK
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- SNOW
- PRODUCT NAME:
- CAP
- TYPE:
- OIL FILLER
$8.99Qty in Cart: 0Quantity:Price:$8.99Subtotal: -
Straightline Performance Billet Head Ski-Doo Summit Everest 800R 2011 113-121
STRAIGHTLINE PERFORMANCE
$425.00The stock billet head on your 2011 Ski-Doo Summit Everest 800R limits your engine's thermal management and combustion efficiency. The Straightline Performance Billet Head 113-121 delivers measurable gains in horsepower and cooling capacity while...09300052- SKU:
- 09300052
- Availability:
- Ships Same Business Day
- Weight:
- 5.60 LBS
- PRODUCT NAME:
- HEAD
- UNITS:
- EACH
- RIDING STYLE:
- SNOW
- TYPE:
- CYLINDER
$425.00Qty in Cart: 0Quantity:Price:$425.00Subtotal: -
Kimpex Needle Bearing for Ski-Doo 1984-1986 Alpine 500 994291
KIMPEX
$10.99The KIMPEX Needle Bearing is engineered for Ski-Doo Alpine 500 engines (1984-1986) where precision and reliability directly impact performance. OEM-spec needle bearings are critical wear items that affect engine efficiency, smoothness, and longevity—this...09524- SKU:
- 09524
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- LENGTH METRIC:
- 22.7 MM
- RIDING STYLE:
- SNOW
- TYPE:
- NEEDLE
- INSIDE DIAMETER METRIC:
- 20 MM
- APPLICATION:
- PISTON
- MATERIAL:
- CHROMIUM MOLYBDENUM ALLOY
- PRODUCT NAME:
- BEARING
- OUTSIDE DIAMETER METRIC:
- 24 MM
- UNITS:
- EACH
$10.99 -
Kimpex Recoil Pulley for Polaris Indy 550 Classic 2014 303324
KIMPEX
$21.79The recoil starter system on your Polaris Indy 550 Classic takes abuse—cold starts, rapid cycling, and sustained tension all wear down OEM pulleys. A failing recoil pulley compromises cold-weather reliability and forces you into emergency repairs. The...09360048- SKU:
- 09360048
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- EACH
- TYPE:
- RECOIL STARTER
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- SNOW
$21.79Qty in Cart: 0Quantity:Price:$21.79Subtotal: -
Kimpex Rewind Starter for Ski-Doo Legend 380 Fan 2003 250055
KIMPEX
$123.57A worn or failing starter can leave you stranded in cold conditions when you need reliable ignition most. The KIMPEX Rewind Starter for your Ski-Doo Legend 380 Fan delivers consistent, dependable starting performance with direct OEM compatibility—no...09360019- SKU:
- 09360019
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
$123.57Qty in Cart: 0Quantity:Price:$123.57Subtotal: -
Kimpex Starter Pawl for Polaris 340 Indy 1999 2004 303027
KIMPEX
$9.99A worn or failed starter pawl will leave you stranded, unable to fire up your Polaris 340 Indy when you need it most. The KIMPEX Starter Pawl is an OE-equivalent direct replacement that restores reliable cold starts and consistent engine engagement...11329- SKU:
- 11329
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- PAWL KIT
- RIDING STYLE:
- SNOW
- TYPE:
- RECOIL STARTER
- UNITS:
- KIT
$9.99Qty in Cart: 0Quantity:Price:$9.99Subtotal: -
Kimpex Recoil Spring Arctic Cat Bearcat 340 1995-1998 303225
KIMPEX
$16.39A worn or failing recoil spring directly impacts your Arctic Cat's cold-start reliability—especially critical during the off-season or in harsh weather conditions. The KIMPEX Recoil Spring restores consistent engagement and smooth starter operation,...112083- SKU:
- 112083
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- SNOW
- TYPE:
- RECOIL STARTER
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- SPRING
- UNITS:
- EACH
$16.39
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Snowmobile Engine Parts
- Compatibility: Confirm parts fit your snowmobile's make (e.g., Arctic Cat, Polaris, Ski-Doo, Yamaha) and engine type (e.g., Sachs, JLO, Hirth, CCW, Kohler, Xenoah). Use the vehicle selector for model-specific matches, ensuring compatibility with current and non-current models to avoid leaks or performance issues.
- Type of Use: For high-performance racing or extreme cold rides, select top-end kits and gaskets for better compression; maintenance or trail use benefits from basic rebuild kits and seals for reliability and longevity in demanding winter conditions.
- Components and Upgrades: Choose from complete gasket sets, top-end kits (e.g., pistons, rings), cylinders/heads, bearings/seals, recoil starters, valves/cams, crankshafts, oil filters/tanks, wrist pins, motor mounts, flywheels/rods, and rebuild kits. Focus on features like high-tech materials for sealing and oil seals for leak-free operation.
- Brand and Quality: Opt for trusted brands like Winderosa for gasket and top-end sets with superior materials, or Maxima Racing Oils for lubricants. Prioritize high-tech, durable constructions that provide unmatched reliability, better compression, and performance in extreme environments.
- Installation and Cost: Many parts like gaskets or seals are DIY-friendly with basic tools; full rebuilds may require mechanics. Prices range from $40 for basic gasket sets to $110 for premium top-end kits—look for bundles and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What snowmobile models and engines do these parts support? Parts are designed for makes like Arctic Cat, Polaris, Ski-Doo, and Yamaha, with compatibility for engines from Sachs, JLO, Hirth, CCW, Kohler, and Xenoah. Use the year/make/model filter for exact fits.
- How do gasket sets improve engine performance? Winderosa complete gasket sets provide superior sealing for leak-free operation, better compression, and increased longevity, ideal for performance engines in extreme cold.
- What do top-end kits typically include? Full top-end sets like Winderosa 710235 include gaskets, oil seals, and high-tech materials for a comprehensive rebuild, ensuring reliability and enhanced performance.
- Are these parts suitable for extreme conditions? Yes, made from high-tech materials designed for demanding snow riding, they offer unmatched durability and performance in harsh winter environments.
- What if a part doesn't fit my snowmobile? Verify compatibility using our selector tool before purchase. If it doesn't match, our returns policy allows exchanges or refunds.
- Can I find related engine components? Yes—explore subcategories like pistons/rings, cylinders/heads, bearings/seals, or browse air and fuel or drivetrain for complementary upgrades.
