FLOWMASTER
Flowmaster Exhaust Systems, Mufflers, and Accessories at JJ Motorsports
Flowmaster, founded in 1983 by Ray Flugger in Santa Rosa, California, initially called Hush Power, revolutionized the automotive exhaust industry by creating mufflers that reduced noise in racecars while enhancing performance. Starting with the iconic "suitcase muffler," Flowmaster has grown into a global leader in high-quality exhaust systems, known for innovation, durability, and superior sound engineering. Their products cater to a wide range of vehicles, including muscle cars, trucks, off-road vehicles, jeeps, SUVs, and classic cars, trusted by enthusiasts and professionals for boosting horsepower and torque.
At JJ Motorsports, we offer a comprehensive selection of Flowmaster products to upgrade your vehicle's exhaust system. For enhanced flow and aggressive sound, check out the American Thunder Cat-Back Exhaust System, or the versatile Outlaw Series Muffler. Improve performance with the Delta Force Headers, and complete your setup using the Scavenger Series Elite Headers. Whether you're tuning for the street or track, Flowmaster provides reliable solutions compatible with various models. Explore our inventory to find the perfect upgrades for your ride.
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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40 Series Delta Flow Muffler FLO942543
FLOWMASTER
$149.95The 40 Series Delta Flow Muffler delivers efficient sound suppression without sacrificing exhaust scavenging—critical for maintaining power output on both street and track applications. Its offset...FLO942543- SKU:
- FLO942543
- Availability:
- Ships Same Business Day
- Weight:
- 10.80 LBS
- MFG Part #:
- 942543
$149.95 -
40 Series Delta Flow Muffler FLO942542
FLOWMASTER
$149.95The 40 Series Delta Flow Muffler delivers effective sound suppression without sacrificing exhaust flow, making it an ideal choice for street and moderate performance applications. Its compact oval...FLO942542- SKU:
- FLO942542
- Availability:
- Ships Same Business Day
- Weight:
- 10.25 LBS
- MFG Part #:
- 942542
$149.95 -
40 Series Delta Flow Muffler FLO942541
FLOWMASTER
$149.95The 40 Series Delta Flow Muffler delivers efficient exhaust scavenging with minimal backpressure, giving you cleaner power delivery across your entire RPM range. Its offset inlet and center outlet...FLO942541- SKU:
- FLO942541
- Availability:
- Ships Same Business Day
- Weight:
- 10.20 LBS
- MFG Part #:
- 942541
$149.95 -
40 Series Delta Flow Muffler FLO942540
FLOWMASTER
$149.95The 40 Series Delta Flow Muffler delivers efficient exhaust scavenging with minimal backpressure, making it ideal for naturally aspirated and moderately boosted engines that demand both performance...FLO942540- SKU:
- FLO942540
- Availability:
- Ships Same Business Day
- Weight:
- 10.75 LBS
- MFG Part #:
- 942540
$149.95 -
50 Series Delta Flow Muffler FLO942453
FLOWMASTER
$173.95The 50 Series Delta Flow Muffler delivers efficient exhaust scavenging with minimal backpressure, making it an excellent choice for naturally aspirated and forced-induction applications where flow...FLO942453- SKU:
- FLO942453
- Availability:
- Ships Same Business Day
- Weight:
- 15.00 LBS
- MFG Part #:
- 942453
$173.95 -
50 Series Delta Flow Muffler FLO942452
FLOWMASTER
$173.95The 50 Series Delta Flow Muffler delivers efficient exhaust scavenging without sacrificing street manners or drone characteristics. Its offset outlet design allows flexible routing for tight engine...FLO942452- SKU:
- FLO942452
- Availability:
- Ships Same Business Day
- Weight:
- 14.95 LBS
- MFG Part #:
- 942452
$173.95 -
50 Series Delta Flow Muffler FLO942451
FLOWMASTER
$173.95The 50 Series Delta Flow Muffler delivers a balance of sound control and exhaust scavenging efficiency without sacrificing performance gains. Its oval body design maximizes internal flow...FLO942451- SKU:
- FLO942451
- Availability:
- Ships Same Business Day
- Weight:
- 14.05 LBS
- MFG Part #:
- 942451
$173.95 -
50 Series Delta Flow Muffler FLO942450
FLOWMASTER
$185.95The 50 Series Delta Flow Muffler delivers efficient exhaust scavenging with minimal backpressure, making it ideal for naturally aspirated and moderately boosted applications that demand both...FLO942450- SKU:
- FLO942450
- Availability:
- Ships Same Business Day
- Weight:
- 14.00 LBS
- MFG Part #:
- 942450
$185.95 -
Super 44 Series Muffler FLO942448
FLOWMASTER
$137.95The Super 44 Series Muffler delivers straight-forward exhaust flow management without compromising sound control, making it an ideal choice for builders who want reliable performance without excess...FLO942448- SKU:
- FLO942448
- Availability:
- Ships Same Business Day
- Weight:
- 10.25 LBS
- MFG Part #:
- 942448
$137.95 -
Super 44 Series Muffler FLO942447
FLOWMASTER
$137.95The Super 44 Series Muffler delivers aggressive sound character while maintaining flow efficiency—ideal for street machines and weekend warriors who refuse to compromise on performance. Its compact...FLO942447- SKU:
- FLO942447
- Availability:
- Ships Same Business Day
- Weight:
- 10.20 LBS
- MFG Part #:
- 942447
$137.95 -
Super 44 Series Muffler FLO942446
FLOWMASTER
$137.95The Super 44 Series Muffler delivers the exhaust flow efficiency and acoustic control serious racers and performance enthusiasts demand. Its offset inlet and center outlet design optimize exhaust...FLO942446- SKU:
- FLO942446
- Availability:
- Ships Same Business Day
- Weight:
- 10.05 LBS
- MFG Part #:
- 942446
$137.95 -
Super 44 Series Muffler FLO942445
FLOWMASTER
$137.95The Super 44 Series Muffler delivers straightforward exhaust flow efficiency without unnecessary complexity, making it an ideal choice for builders who want reliable sound deadening and proven...FLO942445- SKU:
- FLO942445
- Availability:
- Ships Same Business Day
- Weight:
- 10.70 LBS
- MFG Part #:
- 942445
$137.95 -
40 Series Delta Flow Muffler FLO942441
FLOWMASTER
$149.95If you're building a custom exhaust system or upgrading an existing setup, the 40 Series Delta Flow Muffler delivers the flow characteristics and sound profile serious enthusiasts demand. This...FLO942441- SKU:
- FLO942441
- Availability:
- Ships Same Business Day
- Weight:
- 11.25 LBS
- MFG Part #:
- 942441
$149.95 -
50 Series S/S Delta Flow Muffler FLO843051
FLOWMASTER
$188.95The 50 Series S/S Delta Flow Muffler delivers a refined exhaust note without sacrificing flow efficiency—ideal for street and strip applications where sound quality matters as much as performance...FLO843051- SKU:
- FLO843051
- Availability:
- Ships Same Business Day
- Weight:
- 13.80 LBS
- MFG Part #:
- 843051
$188.95 -
Super 44 Series Muffler FLO843048
FLOWMASTER
$139.95The Super 44 Series Muffler delivers the acoustic refinement and exhaust flow efficiency that serious enthusiasts demand without sacrificing durability or reliability. Its stainless steel...FLO843048- SKU:
- FLO843048
- Availability:
- Ships Same Business Day
- Weight:
- 10.30 LBS
- MFG Part #:
- 843048
$139.95 -
Super 44 Series Muffler FLO843046
FLOWMASTER
$139.95The Super 44 Series Muffler delivers straight-through flow dynamics that reduce backpressure while maintaining a refined exhaust note—ideal for builders who demand both performance and street manners...FLO843046- SKU:
- FLO843046
- Availability:
- Ships Same Business Day
- Weight:
- 9.95 LBS
- MFG Part #:
- 843046
$139.95 -
Super 44 Series Muffler FLO8430452
FLOWMASTER
$139.95The Super 44 Series Muffler delivers aggressive exhaust tone while maintaining backpressure control for consistent engine performance across RPM ranges. Its compact oval body fits tight engine bays...FLO8430452- SKU:
- FLO8430452
- Availability:
- Ships Same Business Day
- Weight:
- 10.70 LBS
- MFG Part #:
- 8430452
$139.95 -
50 Series S/S Delta Flow Muffler FLO842553
FLOWMASTER
$188.95A quality muffler is the foundation of any performance exhaust system, delivering the flow characteristics and durability your engine demands. The 50 Series S/S Delta Flow combines offset inlet and...FLO842553- SKU:
- FLO842553
- Availability:
- Ships Same Business Day
- Weight:
- 13.90 LBS
- MFG Part #:
- 842553
$188.95Qty in Cart: 0Quantity:Price:$188.95Subtotal: -
50 Series S/S Delta Flow Muffler FLO842551
FLOWMASTER
$188.95The 50 Series S/S Delta Flow Muffler delivers straight-through performance without unnecessary complexity. Built from stainless steel and engineered for optimal exhaust scavenging, it reduces...FLO842551- SKU:
- FLO842551
- Availability:
- Ships Same Business Day
- Weight:
- 14.25 LBS
- MFG Part #:
- 842551
$188.95 -
Super 44 Series Muffler FLO842546
FLOWMASTER
$139.95The Super 44 Series Muffler delivers aggressive exhaust tone without sacrificing street manners or durability. Built from stainless steel and designed for offset inlet fitment, this muffler...FLO842546- SKU:
- FLO842546
- Availability:
- Ships Same Business Day
- Weight:
- 9.85 LBS
- MFG Part #:
- 842546
$139.95 -
50 Series S/S Delta Flow Muffler FLO842453
FLOWMASTER
$188.95The 50 Series S/S Delta Flow Muffler delivers aggressive sound control without sacrificing exhaust flow—essential for builders who demand both performance and street legality. Its stainless steel...FLO842453- SKU:
- FLO842453
- Availability:
- Ships Same Business Day
- Weight:
- 14.50 LBS
- MFG Part #:
- 842453
$188.95 -
Axle-Back Exhaust Kit 19- Dodge Ram 1500 5.7L FLO817850
FLOWMASTER
$425.95If you're running a 5.7L in your 2019 Ram 1500, factory exhaust is leaving horsepower on the table and choking out your truck's true sound. This stainless steel axle-back kit bolts directly to your...FLO817850- SKU:
- FLO817850
- Availability:
- Ships Same Business Day
- Weight:
- 16.60 LBS
- MFG Part #:
- 817850
$425.95 -
Axle-Back Exhaust Kit 18- Jeep JL 3.6L 2/4DR FLO817837
FLOWMASTER
$199.95If you're running a 3.6L JL Wrangler, you know that factory exhaust systems sacrifice both performance and sound for emissions compliance. This axle-back kit replaces the restrictive rear section...FLO817837- SKU:
- FLO817837
- Availability:
- Ships Same Business Day
- Weight:
- 5.20 LBS
- MFG Part #:
- 817837
$199.95 -
Cat-Back Exhaust Kit 15- Ford F150 2.7/3.5/5.0L FLO817725
FLOWMASTER
$1,126.95A quality cat-back exhaust system unlocks noticeable performance gains while delivering the aggressive sound your truck deserves. The American Thunder design combines proven engineering with...FLO817725- SKU:
- FLO817725
- Availability:
- Ships Same Business Day
- Weight:
- 69.00 LBS
- MFG Part #:
- 817725
$1,126.95 -
Cat Back Exhaust Kit 09- Toyota Tundra 4.6/5.7L FLO817708
FLOWMASTER
$562.95If you're running a 4.6L or 5.7L Tundra, a restrictive factory exhaust is costing you power and throttle response. This cat-back kit flows significantly better than OEM, reducing backpressure while...FLO817708- SKU:
- FLO817708
- Availability:
- Ships Same Business Day
- Weight:
- 23.50 LBS
- MFG Part #:
- 817708
$562.95 -
Cat-Back Exhaust Kit 09- 14 Ford F150 4.6/5.0/5.4 FLO817707
FLOWMASTER
$460.95If you're running a 2009-2014 Ford F-150 with a V8 engine, the factory exhaust is costing you horsepower and throttle response. This cat-back system replaces the restrictive piping downstream of the...FLO817707- SKU:
- FLO817707
- Availability:
- Ships Same Business Day
- Weight:
- 18.75 LBS
- MFG Part #:
- 817707
$460.95 -
09-16 Ram 1500 4.7/5.7L Outlaw Exhaust Kit FLO817690
FLOWMASTER
$1,177.95A quality exhaust system is foundational to unlocking your Ram 1500's full potential—it reduces backpressure, improves scavenging, and delivers a commanding exhaust note that matches the truck's...FLO817690- SKU:
- FLO817690
- Availability:
- Ships Same Business Day
- Weight:
- 69.85 LBS
- MFG Part #:
- 817690
$1,177.95 -
07-13 GM P/U 5.3L A/T Exhaust Kit FLO817680
FLOWMASTER
$1,177.95A quality exhaust system is one of the most impactful upgrades for your truck, delivering improved airflow, better throttle response, and measurable horsepower gains. The American Thunder Cat-Back...FLO817680- SKU:
- FLO817680
- Availability:
- Ships Same Business Day
- Weight:
- 76.00 LBS
- MFG Part #:
- 817680
$1,177.95 -
Cat-Back Exhaust Kit 14- GM P/U 1500 5.3L FLO817672
FLOWMASTER
$1,177.95A quality cat-back exhaust system is one of the most effective bolt-on upgrades for improving your truck's throttle response, sound character, and fuel efficiency. The FLO Force II Cat-Back for your...FLO817672- SKU:
- FLO817672
- Availability:
- Ships Same Business Day
- Weight:
- 53.30 LBS
- MFG Part #:
- 817672
$1,177.95 -
Cat-Back Exhaust Kit 11-17 GM P/U 1500 6.2L FLO817602
FLOWMASTER
$1,126.95A cat-back exhaust system is one of the most effective bolt-on upgrades for unlocking your truck's full potential. This American Thunder kit delivers improved throttle response, reduced...FLO817602- SKU:
- FLO817602
- Availability:
- Ships Same Business Day
- Weight:
- 70.00 LBS
- MFG Part #:
- 817602
$1,126.95 -
A/T Exhaust System - 09- Dodge P/U 5.7L FLO817477
FLOWMASTER
$999.95A quality exhaust system is foundational to unlocking your 5.7L's potential—restrictive factory piping robs you of horsepower and throttle response you've already paid for. The FLO A/T Cat-Back...FLO817477- SKU:
- FLO817477
- Availability:
- Ships Same Business Day
- Weight:
- 56.05 LBS
- MFG Part #:
- 817477
$999.95 -
40 Series S/S Muffler FLO8043043
FLOWMASTER
$135.95A quality muffler is essential for managing exhaust noise while maintaining backpressure that preserves engine performance. The 40 Series S/S Muffler delivers straightforward functionality with...FLO8043043- SKU:
- FLO8043043
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- MFG Part #:
- 8043043
$135.95 -
40 Series S/S Muffler FLO8043041
FLOWMASTER
$135.95If you're building a custom exhaust system or upgrading from restrictive OEM components, a quality muffler is essential for balancing performance gains with street legality. The 40 Series S/S Muffler...FLO8043041- SKU:
- FLO8043041
- Availability:
- Ships Same Business Day
- Weight:
- 10.05 LBS
- MFG Part #:
- 8043041
$135.95 -
40 Series S/S Muffler FLO80430402
FLOWMASTER
$135.95A quality muffler is fundamental to any performance exhaust system—it reduces noise while maintaining flow efficiency without sacrificing scavenging. The 40 Series S/S Muffler delivers a tuned design...FLO80430402- SKU:
- FLO80430402
- Availability:
- Ships Same Business Day
- Weight:
- 10.20 LBS
- MFG Part #:
- 80430402
$135.95 -
40 Series S/S Muffler FLO8042543
FLOWMASTER
$135.95A quality muffler is essential for controlling exhaust noise while maintaining optimal flow—this 40 Series stainless steel unit delivers both without sacrificing performance. The offset inlet and...FLO8042543- SKU:
- FLO8042543
- Availability:
- Ships Same Business Day
- Weight:
- 9.50 LBS
- MFG Part #:
- 8042543
$135.95 -
40 Series S/S Muffler FLO8042541
FLOWMASTER
$135.95A quality muffler is the foundation of a properly tuned exhaust system—it controls sound levels while minimizing backpressure to keep your engine breathing freely. The 40 Series S/S Muffler delivers...FLO8042541- SKU:
- FLO8042541
- Availability:
- Ships Same Business Day
- Weight:
- 9.80 LBS
- MFG Part #:
- 8042541
$135.95Qty in Cart: 0Quantity:Price:$135.95Subtotal: -
FlowFX Muffler 3in In Offset/Out Offset FLO72198
FLOWMASTER
$71.69The FlowFX Muffler delivers a balance of exhaust flow efficiency and sound control that serious builders expect. Its stainless steel construction resists corrosion while the dual 2.5-inch outlets...FLO72198- SKU:
- FLO72198
- Availability:
- Ships Same Business Day
- Weight:
- 11.45 LBS
- MFG Part #:
- 72198
$71.69 -
Cat-Back Exhaust Kit 19- GM P/U 1500 5.3L FLO717893
FLOWMASTER
$972.95A quality cat-back exhaust system is one of the most effective upgrades for improving your 5.3L truck's performance and sound. The FLO717893 delivers increased flow and horsepower by replacing...FLO717893- SKU:
- FLO717893
- Availability:
- Ships Same Business Day
- Weight:
- 61.80 LBS
- MFG Part #:
- 717893
$972.95 -
Cat-Back Exhaust Kit 15-18 Ford F150 2.7/3.5L FLO717871
FLOWMASTER
$1,075.95A factory exhaust system restricts flow and limits your F-150's potential—this cat-back kit opens up power you're already paying for. The FlowFX design reduces backpressure while the stainless steel...FLO717871- SKU:
- FLO717871
- Availability:
- Ships Same Business Day
- Weight:
- 71.00 LBS
- MFG Part #:
- 717871
$1,075.95 -
Cat-Back Exhaust Kit 14-18 GM P/U 1500 5.3L FLO717869
FLOWMASTER
$911.95A quality exhaust system is one of the highest-ROI upgrades for your truck, delivering measurable gains in horsepower, throttle response, and fuel efficiency while improving exhaust scavenging. The...FLO717869- SKU:
- FLO717869
- Availability:
- Ships Same Business Day
- Weight:
- 65.00 LBS
- MFG Part #:
- 717869
$911.95
