S&S CYCLE
Shop S&S Cycle Harley-Davidson Performance Parts: Big Bore Kits, Engines & Exhaust at JJ Motorsports
Discover legendary S&S Cycle performance parts, the premier USA-based manufacturer of high-horsepower motorcycle engines and components since 1958. Founded by George J. Smith and Stanley Stankos, S&S is the go-to brand for serious Harley-Davidson builders and racers seeking maximum power, reliability, and American-made quality. From complete long-block engines and big bore top-end kits to flywheels, cams, carburetors, and race-proven exhaust systems, S&S delivers groundbreaking innovations like the T143 engine, MK45 mufflers, and Shovelhead-style heads that transform stock Harleys into fire-breathing machines.
At JJ Motorsports, we stock the full line of S&S Cycle parts at competitive prices with fast shipping. Build more cubic inches, add serious torque, or upgrade your exhaust note with the brand trusted by champions for over 65 years. Explore related categories such as motorcycle engines and components for complete builds or motorcycle exhaust for power gains.
Top S&S Cycle Products
- S&S Cycle Top End Kit - Big Twin 90-0097 – Complete bolt-on top-end kit with Shovelhead-style heads, stock bore cylinders, 8:1 forged pistons, gaskets, and hardware — no machining required for instant big-inch power.
- S&S Cycle Flywheel Assembly 320-0598 – Forged steel flywheel assembly with keyed 6" tapered sprocket shaft, balanced to stock HD 80" pistons, includes crankpin and connecting rods — built for high-performance and custom applications.
- S&S Cycle 4-1/2" Chrome MK45 Cutlass Performance Mufflers 550-1011 – Bold 4-1/2" chrome mufflers with stainless steel baffles, RaceTEX packing for deep bass rumble, removable dB reducer, and 50-state legal — massive looks with serious performance gains.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
S&S CYCLE Turbocharger Conversion Kit 560-0340
S&S CYCLE
MSRP: $6,999.95Now: $6,299.96Was: $6,999.95Turbocharger Conversion Kit 50%+ increase in horsepower over factory, Tuned for 10 psi of boost, 9:1 compression ratio, forged piston kit (OEM 11.5:1), Power Tune XTO? muffler, Full size aluminum...18300658- SKU:
- 18300658
- Availability:
- Ships Same Business Day
- Weight:
- 136.00 LBS
MSRP: $6,999.95Now: $6,299.96Was: $6,999.95 -
On Sale
S&S CYCLE Cam Sprocket - Adjustable - Polaris 330-0753
S&S CYCLE
MSRP: $189.95Now: $170.96Was: $189.95Cam Sprocket - Adjustable - Polaris Plus/minus 10? of adjustability on the camshaft (crankshaft degrees), General affects of lobe separation angle, Narrower: increased overlap, broad torque cure,...09251512- SKU:
- 09251512
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
MSRP: $189.95Now: $170.96Was: $189.95 -
On Sale
S&S CYCLE Adjustable Clutch Weight Kit - RZR Pro XP 560-0344
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95Adjustable Clutch Weight Kit - RZR Pro XP Clutch weights are machined, heat treated and coated steel with a magnetic weight kit that will allow you to adjust clutching to suit your setup as well as...11400907- SKU:
- 11400907
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
S&S CYCLE Adjustable Clutch Weight Kit - RZR XP Turbo 560-0345
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95Adjustable Clutch Weight Kit - RZR XP Turbo Clutch weights are machined, heat treated and coated steel with a magnetic weight kit that will allow you to adjust clutching to suit your setup as well as...11400908- SKU:
- 11400908
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
S&S CYCLE Adjustable Clutch Weight Kit - RZR XP 1000 560-0346
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95Adjustable Clutch Weight Kit - RZR XP 1000 Clutch weights are machined, heat treated and coated steel with a magnetic weight kit that will allow you to adjust clutching to suit your setup as well as...11400909- SKU:
- 11400909
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
S&S CYCLE Replacement Fuel Rail - Polaris 560-0362
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95Replacement Fuel Rail - Polaris Say goodbye to weak OEM fuel rails and hello to durability and performance, Ultimate solution for riders seeking reliability and enhanced fuel delivery, Crafted from...10220298- SKU:
- 10220298
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
S&S CYCLE Power Tune XTO Insert Kit 550-1032
S&S CYCLE
MSRP: $499.95Now: $449.96Was: $499.95Tunable inserts allow for easy sound and power adjustment, Power and torque tuning, Tone and sound adjustment, Ease of installing18602158- SKU:
- 18602158
- Availability:
- Ships Same Business Day
- Weight:
- 9.15 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- UNITS:
- KIT
- PRODUCT NAME:
- INSERT KIT
- RIDING STYLE:
- UTV
MSRP: $499.95Now: $449.96Was: $499.95 -
On Sale
S&S CYCLE Insert Power Tune 550-1661
S&S CYCLE
MSRP: $25.95Now: $23.36Was: $25.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602160- SKU:
- 18602160
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 1-1/2'
- TYPE:
- MUFFLER
- UNITS:
- EACH
- RIDING STYLE:
- UTV
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- PRODUCT NAME:
- INSERT
- STYLE:
- UNPLUGGED
MSRP: $25.95Now: $23.36Was: $25.95 -
On Sale
S&S CYCLE Insert Power Tune 550-1662
S&S CYCLE
MSRP: $25.95Now: $23.36Was: $25.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602161- SKU:
- 18602161
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MODEL:
- POWER TUNE® XTO
- PRODUCT NAME:
- INSERT
- RIDING STYLE:
- UTV
- MATERIAL:
- 304 STAINLESS STEEL
- OUTSIDE DIAMETER IMPERIAL:
- 1-5/8'
- STYLE:
- UNPLUGGED
- TYPE:
- MUFFLER
- UNITS:
- EACH
MSRP: $25.95Now: $23.36Was: $25.95 -
On Sale
S&S CYCLE Insert Power Tune 550-1663
S&S CYCLE
MSRP: $25.95Now: $23.36Was: $25.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602162- SKU:
- 18602162
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 1-3/4'
- MODEL:
- POWER TUNE® XTO
- PRODUCT NAME:
- INSERT
- RIDING STYLE:
- UTV
- MATERIAL:
- 304 STAINLESS STEEL
- STYLE:
- UNPLUGGED
- TYPE:
- MUFFLER
- UNITS:
- EACH
MSRP: $25.95Now: $23.36Was: $25.95 -
S&S CYCLE Insert Power Tune 550-1664
S&S CYCLE
$25.16Power and torque tuning, Tone and sound adjustment, Ease of installing18602163- SKU:
- 18602163
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- TYPE:
- MUFFLER
- UNITS:
- EACH
- MODEL:
- POWER TUNE® XTO
- PRODUCT NAME:
- INSERT
- STYLE:
- UNPLUGGED
- OUTSIDE DIAMETER IMPERIAL:
- 1-7/8'
- RIDING STYLE:
- UTV
$25.16 -
On Sale
S&S CYCLE Insert Power Tune 550-1665
S&S CYCLE
MSRP: $25.95Now: $23.36Was: $25.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602164- SKU:
- 18602164
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- UTV
- MODEL:
- POWER TUNE® XTO
- PRODUCT NAME:
- INSERT
- MATERIAL:
- 304 STAINLESS STEEL
- OUTSIDE DIAMETER IMPERIAL:
- 2'
- STYLE:
- UNPLUGGED
- TYPE:
- MUFFLER
- UNITS:
- EACH
MSRP: $25.95Now: $23.36Was: $25.95 -
On Sale
S&S CYCLE Insert Power Tune 550-1666
S&S CYCLE
MSRP: $35.95Now: $32.36Was: $35.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602165- SKU:
- 18602165
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- UTV
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- OUTSIDE DIAMETER IMPERIAL:
- 2-1/4'
- PRODUCT NAME:
- INSERT
- STYLE:
- UNPLUGGED
- TYPE:
- MUFFLER
- UNITS:
- EACH
MSRP: $35.95Now: $32.36Was: $35.95 -
On Sale
S&S CYCLE Insert Power Tune 550-1667
S&S CYCLE
MSRP: $29.95Now: $26.96Was: $29.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602166- SKU:
- 18602166
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- PRODUCT NAME:
- INSERT
- TYPE:
- MUFFLER
- UNITS:
- EACH
- OUTSIDE DIAMETER IMPERIAL:
- 1-3/4'
- RIDING STYLE:
- UTV
- STYLE:
- PLUGGED
MSRP: $29.95Now: $26.96Was: $29.95 -
On Sale
S&S CYCLE Insert Power Tune 550-1668
S&S CYCLE
MSRP: $11.95Now: $11.66Was: $11.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602167- SKU:
- 18602167
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- UTV
- STYLE:
- FRONT
- STYLE:
- PLUGGED
- MATERIAL:
- 304 STAINLESS STEEL
- TYPE:
- MUFFLER
- UNITS:
- EACH
- MODEL:
- POWER TUNE® XTO
- OUTSIDE DIAMETER IMPERIAL:
- 1-3/4'
- PRODUCT NAME:
- INSERT
MSRP: $11.95Now: $11.66Was: $11.95 -
On Sale
S&S CYCLE Insert Power Tune 550-1669
S&S CYCLE
MSRP: $40.95Now: $36.86Was: $40.95Power and torque tuning, Tone and sound adjustment, Ease of installing18602168- SKU:
- 18602168
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- RIDING STYLE:
- UTV
- STYLE:
- PLUGGED
- TYPE:
- MUFFLER
- UNITS:
- EACH
- OUTSIDE DIAMETER IMPERIAL:
- 1-3/4'
- PRODUCT NAME:
- INSERT
- STYLE:
- REAR
MSRP: $40.95Now: $36.86Was: $40.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Muffler - 49 State 550-1035
S&S CYCLE
MSRP: $1,176.95Now: $1,059.26Was: $1,176.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, 49 State legal, Meets J335 Forestry Standards, NOT LEGAL...18310988- SKU:
- 18310988
- Availability:
- Ships Same Business Day
- Weight:
- 32.90 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- RIDING STYLE:
- UTV
- STYLE:
- DUAL
- PRODUCT NAME:
- MUFFLER
- UNITS:
- EACH
MSRP: $1,176.95Now: $1,059.26Was: $1,176.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Muffler - 49 State 550-1036
S&S CYCLE
MSRP: $1,176.95Now: $1,059.26Was: $1,176.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, 49 State legal, Meets J335 Forestry Standards, NOT LEGAL...18310989- SKU:
- 18310989
- Availability:
- Ships Same Business Day
- Weight:
- 40.00 LBS
- PRODUCT NAME:
- MUFFLER
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- UNITS:
- EACH
- RIDING STYLE:
- UTV
- STYLE:
- DUAL
MSRP: $1,176.95Now: $1,059.26Was: $1,176.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Muffler - 49 State 550-1037
S&S CYCLE
MSRP: $1,176.95Now: $1,059.26Was: $1,176.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, 49 State legal, Meets J335 Forestry Standards, NOT LEGAL...18310990- SKU:
- 18310990
- Availability:
- Ships Same Business Day
- Weight:
- 44.00 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- STYLE:
- DUAL
- UNITS:
- EACH
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- MUFFLER
- MODEL:
- POWER TUNE® XTO
MSRP: $1,176.95Now: $1,059.26Was: $1,176.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Muffler - 49 State 550-1038
S&S CYCLE
MSRP: $1,285.95Now: $1,157.36Was: $1,285.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, 49 State legal, Meets J335 Forestry Standards, NOT LEGAL...18310991- SKU:
- 18310991
- Availability:
- Ships Same Business Day
- Weight:
- 39.20 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- STYLE:
- DUAL
- UNITS:
- EACH
- MODEL:
- POWER TUNE® XTO
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- MUFFLER
MSRP: $1,285.95Now: $1,157.36Was: $1,285.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Race Muffler 550-1040
S&S CYCLE
MSRP: $999.95Now: $899.96Was: $999.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, Meets J335 Forestry Standards, NOT LEGAL FOR SALE OR...18310992- SKU:
- 18310992
- Availability:
- Ships Same Business Day
- Weight:
- 31.20 LBS
- MATERIAL:
- 304 STAINLESS STEEL
- STYLE:
- DUAL
- UNITS:
- EACH
- MODEL:
- POWER TUNE® XTO
- RIDING STYLE:
- UTV
- STYLE:
- RACE
- PRODUCT NAME:
- MUFFLER
MSRP: $999.95Now: $899.96Was: $999.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Race Muffler 550-1041
S&S CYCLE
MSRP: $999.95Now: $899.96Was: $999.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, Meets J335 Forestry Standards, NOT LEGAL FOR SALE OR...18310993- SKU:
- 18310993
- Availability:
- Ships Same Business Day
- Weight:
- 32.50 LBS
- MODEL:
- POWER TUNE® XTO
- RIDING STYLE:
- UTV
- STYLE:
- RACE
- MATERIAL:
- 304 STAINLESS STEEL
- STYLE:
- DUAL
- UNITS:
- EACH
- PRODUCT NAME:
- MUFFLER
MSRP: $999.95Now: $899.96Was: $999.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Race Muffler 550-1042
S&S CYCLE
MSRP: $999.95Now: $899.96Was: $999.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, Meets J335 Forestry Standards, NOT LEGAL FOR SALE OR...18310994- SKU:
- 18310994
- Availability:
- Ships Same Business Day
- Weight:
- 32.10 LBS
- MODEL:
- POWER TUNE® XTO
- STYLE:
- RACE
- MATERIAL:
- 304 STAINLESS STEEL
- RIDING STYLE:
- UTV
- STYLE:
- DUAL
- PRODUCT NAME:
- MUFFLER
- UNITS:
- EACH
MSRP: $999.95Now: $899.96Was: $999.95 -
On Sale
S&S CYCLE Power Tune‚® XTO Race Muffler 550-1043
S&S CYCLE
MSRP: $999.95Now: $899.96Was: $999.95Tunable inserts allow for easy sound and power adjustment, Improved power and torque, Dual outlet & Stylized tips, Removable spark arrestors, Meets J335 Forestry Standards, NOT LEGAL FOR SALE OR...18310995- SKU:
- 18310995
- Availability:
- Ships Same Business Day
- Weight:
- 40.70 LBS
- PRODUCT NAME:
- MUFFLER
- MATERIAL:
- 304 STAINLESS STEEL
- MODEL:
- POWER TUNE® XTO
- STYLE:
- RACE
- UNITS:
- EACH
- RIDING STYLE:
- UTV
- STYLE:
- DUAL
MSRP: $999.95Now: $899.96Was: $999.95
S&S Cycle
S&S Cycle stands as a towering icon in the motorcycle industry, renowned for its unwavering commitment to excellence and innovation in performance motorcycle parts. Founded in 1958 by the dynamic duo of George J. Smith and Stanley Stankos, S&S Cycle has carved its niche as the premier engineer and manufacturer of motorcycle engines and parts in America. Originating from a passion for racing, the company has spent over six decades perfecting the art of motorcycle performance, ensuring each piece that comes out of their factory not only meets but exceeds the high expectations of the powersports community. With a deep-rooted history in enhancing the power and performance of Harley-Davidson® motorcycles, S&S Cycle is the go-to brand for enthusiasts seeking unmatched quality and proven performance.
S&S Cycle Parts
S&S Cycle's product line extends far beyond just engines; it encompasses a broad array of components designed to elevate the performance of your motorcycle. From the initial solid lifter conversion kit featuring lightweight aluminum pushrods to state-of-the-art carburetors, air cleaners, and throttle bodies, every part is engineered with precision. The brand's dedication to innovation means continually refining and expanding their offerings to include everything a motorcycle might need for optimal performance and reliability.
S&S Cycle Engines
At the heart of S&S Cycle's legacy are its engines. Renowned for their robustness and reliability, S&S engines come in various styles, including the iconic Knucklehead, Shovelhead, Panhead, Evolution-style, and Twin-cam style engines. Each engine, like the T143 Assembled Long Block Engine, is meticulously constructed to provide unmatched power and torque, transforming any motorcycle into a high-performance machine. S&S's commitment to quality ensures that whether you're cruising the streets or dominating the racetrack, their engines will deliver unparalleled performance.
S&S Cams
S&S cams are designed to unlock the full potential of your motorcycle's engine. With a focus on maximizing horsepower, torque, and overall engine efficiency, S&S cams are a critical component for anyone looking to boost their bike's performance. Each cam is the result of exhaustive research and development, ensuring compatibility and impressive gains across various riding conditions. Whether you're upgrading an existing engine or building a custom setup, S&S cams are essential for achieving peak performance.
S&S Motorcycle Exhausts
To complement their engines and performance parts, S&S Cycle also offers a range of high-quality motorcycle exhaust systems. These exhausts are not only built to withstand the rigors of high-performance riding but are also designed to optimize exhaust flow, enhancing both sound and power output. From aggressive race-inspired designs to more subdued styles for daily riding, S&S Cycle's exhaust systems combine performance improvements with aesthetic appeal, making them a favorite among discerning riders.
