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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Cat-Back Exhaust Kit 09-13 GM P/U 1500 5.3L FLO717822
FLOWMASTER
$972.95A quality cat-back exhaust system transforms your truck's performance by reducing backpressure and unlocking additional horsepower while delivering a deeper, more aggressive sound. The FlowFX design...FLO717822- SKU:
- FLO717822
- Availability:
- Ships Same Business Day
- Weight:
- 55.25 LBS
- MFG Part #:
- 717822
$972.95 -
Cat-Back Exhaust Kit 14- GM P/U 1500 5.3L FLO717787
FLOWMASTER
$799.95A cat-back exhaust system is one of the most direct ways to unlock hidden performance from your 5.3L truck while improving throttle response and fuel efficiency. The FlowFX design optimizes...FLO717787- SKU:
- FLO717787
- Availability:
- Ships Same Business Day
- Weight:
- 37.70 LBS
- MFG Part #:
- 717787
$799.95 -
FlowFX Muffler 2.5in In Offset/Out Offset FLO71236
FLOWMASTER
$71.69The FlowFX Muffler delivers a balance of acoustic performance and exhaust flow efficiency for builders who refuse to compromise on either. Its offset inlet and outlet design simplifies installation...FLO71236- SKU:
- FLO71236
- Availability:
- Ships Same Business Day
- Weight:
- 11.10 LBS
- MFG Part #:
- 71236
$71.69 -
FlowFX Muffler 2.25in In Offset/Out Offset FLO71235
FLOWMASTER
$71.69The FlowFX Muffler delivers a straight-through design that maximizes exhaust scavenging while maintaining a refined acoustic signature—ideal for street machines and track builds where backpressure...FLO71235- SKU:
- FLO71235
- Availability:
- Ships Same Business Day
- Weight:
- 10.60 LBS
- MFG Part #:
- 71235
$71.69 -
FlowFX Muffler 3in In Offset/Out Center FLO71229
FLOWMASTER
$71.69The FlowFX Muffler delivers efficient exhaust flow without sacrificing sound control—critical when you need to meet noise regulations without compromising performance. Its compact oval design fits...FLO71229- SKU:
- FLO71229
- Availability:
- Ships Same Business Day
- Weight:
- 10.80 LBS
- MFG Part #:
- 71229
$71.69 -
FlowFX Muffler 2.5in In Offset/Out Center FLO71226
FLOWMASTER
$71.69The FlowFX Muffler delivers a balanced approach to exhaust flow and sound control without sacrificing drone or performance. Its offset inlet and center outlet configuration integrates seamlessly into...FLO71226- SKU:
- FLO71226
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- MFG Part #:
- 71226
$71.69 -
FlowFX Muffler 2.25in In Offset/Out Center FLO71225
FLOWMASTER
$71.69A quality muffler is essential for balancing exhaust flow with sound control—and the FlowFX 2.25in delivers both without compromise. This universal stainless steel design fits a wide range of...FLO71225- SKU:
- FLO71225
- Availability:
- Ships Same Business Day
- Weight:
- 11.00 LBS
- MFG Part #:
- 71225
$71.69 -
Engine Cold Air Intake 15-17 Ford F150 3.5L FLO615136
FLOWMASTER
$371.95A properly engineered cold air intake significantly increases oxygen flow to your engine's combustion chamber, resulting in measurable gains in horsepower and torque while improving throttle response...FLO615136- SKU:
- FLO615136
- Availability:
- Ships Same Business Day
- Weight:
- 11.80 LBS
- MFG Part #:
- 615136
$371.95 -
Engine Cold Air Intake 09-14 GM P/U 4.8/5.3/6.0 FLO615120
FLOWMASTER
$511.95A factory intake restricts airflow to your LS engine, costing you measurable horsepower and throttle response. This cold air intake delivers cooler, denser air to the combustion chamber, unlocking...FLO615120- SKU:
- FLO615120
- Availability:
- Ships Same Business Day
- Weight:
- 11.80 LBS
- MFG Part #:
- 615120
$511.95 -
70 Series Hi-Performance Muffler FLO53072
FLOWMASTER
$249.95The 70 Series Hi-Performance Muffler is engineered for serious builders who refuse to compromise on exhaust flow. Its efficient internal design minimizes backpressure while delivering the aggressive...FLO53072- SKU:
- FLO53072
- Availability:
- Ships Same Business Day
- Weight:
- 21.45 LBS
- MFG Part #:
- 53072
$249.95 -
70 Series Hi-Performance Muffler FLO53071
FLOWMASTER
$249.95The 70 Series Hi-Performance Muffler delivers serious flow improvement without sacrificing sound control—critical for racers and street enthusiasts who demand reliable power gains. Its large oval...FLO53071- SKU:
- FLO53071
- Availability:
- Ships Same Business Day
- Weight:
- 21.10 LBS
- MFG Part #:
- 53071
$249.95 -
70 Series Hi-Performance Muffler FLO53070
FLOWMASTER
$249.95If you're running a big block engine and need to reclaim horsepower while maintaining street-legal sound levels, the 70 Series Hi-Performance Muffler delivers a tuned exhaust note without sacrificing...FLO53070- SKU:
- FLO53070
- Availability:
- Ships Same Business Day
- Weight:
- 21.55 LBS
- MFG Part #:
- 53070
$249.95Qty in Cart: 0Quantity:Price:$249.95Subtotal: -
50 Series Performance SUV Muffler FLO53058
FLOWMASTER
$199.95If you're running an SUV that needs serious exhaust flow improvement without the hassle of custom fabrication, the 50 Series Performance SUV Muffler delivers measurable gains in horsepower and...FLO53058- SKU:
- FLO53058
- Availability:
- Ships Same Business Day
- Weight:
- 17.00 LBS
- MFG Part #:
- 53058
$199.95 -
50 Series Performance SUV Muffler FLO53057
FLOWMASTER
$199.95A quality muffler is essential for controlling exhaust noise while maintaining engine efficiency—cheap units rob horsepower and fail prematurely. The FLO53057 50 Series delivers smooth sound...FLO53057- SKU:
- FLO53057
- Availability:
- Ships Same Business Day
- Weight:
- 17.60 LBS
- MFG Part #:
- 53057
$199.95 -
50 Series Performance SUV Muffler FLO53056
FLOWMASTER
$204.95The 50 Series Performance SUV Muffler delivers aggressive sound control without sacrificing flow efficiency, making it an ideal choice for SUV owners seeking a noticeable performance upgrade. This...FLO53056- SKU:
- FLO53056
- Availability:
- Ships Same Business Day
- Weight:
- 16.50 LBS
- MFG Part #:
- 53056
$204.95 -
50 Series Performance SUV Muffler FLO53055
FLOWMASTER
$204.95The 50 Series Performance SUV Muffler delivers measurable sound attenuation and backpressure optimization without sacrificing the aggressive tone serious enthusiasts demand. Its compact oval design...FLO53055- SKU:
- FLO53055
- Availability:
- Ships Same Business Day
- Weight:
- 16.35 LBS
- MFG Part #:
- 53055
$204.95 -
70 Series Hi-Performance Muffler FLO52571
FLOWMASTER
$249.95A quality muffler is fundamental to any high-performance exhaust system—it reduces backpressure, controls noise levels, and protects your engine's longevity. The 70 Series Hi-Performance Muffler...FLO52571- SKU:
- FLO52571
- Availability:
- Ships Same Business Day
- Weight:
- 21.75 LBS
- MFG Part #:
- 52571
$249.95 -
50 Series Performance SUV Muffler FLO52558
FLOWMASTER
$199.95If you're running an SUV that demands more aggressive exhaust flow without sacrificing durability, the 50 Series Performance SUV Muffler delivers a straight-forward upgrade that cuts backpressure...FLO52558- SKU:
- FLO52558
- Availability:
- Ships Same Business Day
- Weight:
- 16.80 LBS
- MFG Part #:
- 52558
$199.95 -
50 Series Performance SUV Muffler FLO52557
FLOWMASTER
$204.95A quality muffler is essential for controlling exhaust noise and backpressure without sacrificing performance—especially on SUVs where factory units often compromise flow. The FLO52557 delivers a...FLO52557- SKU:
- FLO52557
- Availability:
- Ships Same Business Day
- Weight:
- 16.95 LBS
- MFG Part #:
- 52557
$204.95 -
50 Series Performance SUV Muffler FLO52556
FLOWMASTER
$204.95A quality muffler is essential for managing exhaust flow while reducing unwanted noise—and the 50 Series Performance SUV Muffler delivers on both fronts. This universal bolt-on unit is engineered to...FLO52556- SKU:
- FLO52556
- Availability:
- Ships Same Business Day
- Weight:
- 17.55 LBS
- MFG Part #:
- 52556
$204.95 -
70 Series Hi-Performance Muffler FLO524703
FLOWMASTER
$249.95If you're running a big block engine and want to optimize exhaust flow without sacrificing durability, the 70 Series Hi-Performance Muffler delivers the straight-through design and tuned internal...FLO524703- SKU:
- FLO524703
- Availability:
- Ships Same Business Day
- Weight:
- 21.70 LBS
- MFG Part #:
- 524703
$249.95Qty in Cart: 0Quantity:Price:$249.95Subtotal: -
50 Series Performance SUV Muffler FLO524553
FLOWMASTER
$204.95The 50 Series Performance SUV Muffler delivers aggressive sound and measurable flow improvements for drivers who refuse to compromise on exhaust efficiency. By reducing backpressure through dual...FLO524553- SKU:
- FLO524553
- Availability:
- Ships Same Business Day
- Weight:
- 17.70 LBS
- MFG Part #:
- 524553
$204.95 -
40 Series Performance Muffler FLO43043
FLOWMASTER
$99.95A quality muffler is fundamental to any performance exhaust system—it controls backpressure while minimizing restriction, directly impacting horsepower and throttle response. The 40 Series...FLO43043- SKU:
- FLO43043
- Availability:
- Ships Same Business Day
- Weight:
- 10.40 LBS
- MFG Part #:
- 43043
$99.95 -
40 Series Performance Muffler FLO43041
FLOWMASTER
$99.95A quality muffler is fundamental to any performance exhaust system—it controls backpressure while minimizing drone at highway speeds. The 40 Series Performance Muffler delivers a tuned acoustic...FLO43041- SKU:
- FLO43041
- Availability:
- Ships Same Business Day
- Weight:
- 9.87 LBS
- MFG Part #:
- 43041
$99.95 -
40 Series Performance Muffler FLO42543
FLOWMASTER
$99.95The 40 Series Performance Muffler delivers a balance of aggressive sound and reliable flow characteristics that serious enthusiasts demand. Its offset inlet and outlet design integrates seamlessly...FLO42543- SKU:
- FLO42543
- Availability:
- Ships Same Business Day
- Weight:
- 10.10 LBS
- MFG Part #:
- 42543
$99.95 -
40 Series Performance Muffler FLO42541
FLOWMASTER
$99.95A quality muffler is essential for balancing performance exhaust flow with street-legal sound levels. The 40 Series FLO42541 delivers a compact, efficient design that works with most exhaust systems...FLO42541- SKU:
- FLO42541
- Availability:
- Ships Same Business Day
- Weight:
- 9.87 LBS
- MFG Part #:
- 42541
$99.95 -
40 Series Performance Muffler FLO42443
FLOWMASTER
$101.95The 40 Series Performance Muffler delivers a purposeful balance between exhaust flow and sound management, cutting back-pressure without introducing drone at highway speeds. Its compact oval design...FLO42443- SKU:
- FLO42443
- Availability:
- Ships Same Business Day
- Weight:
- 10.10 LBS
- MFG Part #:
- 42443
$101.95 -
40 Series Performance Muffler FLO42441
FLOWMASTER
$99.95If you're running a performance exhaust setup, your muffler is critical to balancing horsepower gains with practical street or track performance. The 40 Series Performance Muffler delivers a deep,...FLO42441- SKU:
- FLO42441
- Availability:
- Ships Same Business Day
- Weight:
- 10.10 LBS
- MFG Part #:
- 42441
$99.95 -
Force II Exhaust Kit - 98-03 F150 FLO17472
FLOWMASTER
$767.95A quality cat-back exhaust is one of the most effective upgrades for improving airflow, reducing backpressure, and unlocking your F150's true potential. The Force II delivers a direct bolt-on...FLO17472- SKU:
- FLO17472
- Availability:
- Ships Same Business Day
- Weight:
- 64.60 LBS
- MFG Part #:
- 17472
$767.95 -
Force II Exhaust System - 08- F250 5.4/6.8L FLO17446
FLOWMASTER
$562.95The Force II Cat-Back Exhaust System delivers the scavenging efficiency and flow characteristics your 5.4L or 6.8L F250 demands, reducing backpressure while maintaining street-legal operation. This...FLO17446- SKU:
- FLO17446
- Availability:
- Ships Same Business Day
- Weight:
- 47.50 LBS
- MFG Part #:
- 17446
$562.95 -
99-06 GM P/U Ext Cab SB American Thunder System FLO17428
FLOWMASTER
$799.95If you're running a 1999-2006 GM extended cab pickup with a stock exhaust, you're leaving horsepower and throttle response on the table. The American Thunder cat-back system unlocks that potential...FLO17428- SKU:
- FLO17428
- Availability:
- Ships Same Business Day
- Weight:
- 70.20 LBS
- MFG Part #:
- 17428
$799.95 -
Force II Exhaust System - 05-07 Ford S/D FLO17422
FLOWMASTER
$562.95Factory exhaust systems restrict flow and limit your truck's potential. The Force II Cat-Back exhaust delivers measurable gains in horsepower and torque while eliminating restrictive components that...FLO17422- SKU:
- FLO17422
- Availability:
- Ships Same Business Day
- Weight:
- 48.10 LBS
- MFG Part #:
- 17422
$562.95Qty in Cart: 0Quantity:Price:$562.95Subtotal: -
04-07 F150 P/U American Thunder System FLO17417
FLOWMASTER
$921.95If you're running a 2004-2007 F-150, upgrading to a quality cat-back exhaust system will unlock horsepower you're leaving on the table while delivering a more aggressive, purposeful sound. The...FLO17417- SKU:
- FLO17417
- Availability:
- Ships Same Business Day
- Weight:
- 66.20 LBS
- MFG Part #:
- 17417
$921.95 -
04-08 Ford F150 Force II Exhaust Kit FLO17403
FLOWMASTER
$599.95A quality exhaust system is fundamental to unlocking your F150's potential—reducing backpressure, improving throttle response, and delivering the aggressive sound that matches your truck's attitude...FLO17403- SKU:
- FLO17403
- Availability:
- Ships Same Business Day
- Weight:
- 69.00 LBS
- MFG Part #:
- 17403
$599.95 -
99-05 GM P/U Ext Cab SB American Thunder System FLO17395
FLOWMASTER
$549.95If you're running a late-90s to mid-2000s GM full-size truck, a quality cat-back exhaust system is one of the most cost-effective upgrades you can make. The American Thunder system delivers improved...FLO17395- SKU:
- FLO17395
- Availability:
- Ships Same Business Day
- Weight:
- 45.60 LBS
- MFG Part #:
- 17395
$549.95 -
99-06 GM P/U Reg Cab SB American Thunder System FLO17392
FLOWMASTER
$716.95If you're running a 1999-2006 GM full-size pickup with the regular cab and short bed, this cat-back system delivers the flow and sound your truck deserves without the complexity of a full custom...FLO17392- SKU:
- FLO17392
- Availability:
- Ships Same Business Day
- Weight:
- 36.00 LBS
- MFG Part #:
- 17392
$716.95 -
99-06 GM P/U Reg Cab SB Force II Exhaust System FLO17360
FLOWMASTER
$562.95A quality exhaust system is fundamental to unlocking your truck's potential—improving throttle response, reducing backpressure, and delivering a more aggressive tone. The Force II Cat-Back delivers...FLO17360- SKU:
- FLO17360
- Availability:
- Ships Same Business Day
- Weight:
- 45.55 LBS
- MFG Part #:
- 17360
$562.95 -
01-06 Avalanche/Sub/ Yukon XL American Thnder FLO17342
FLOWMASTER
$921.95A quality exhaust system is fundamental to unlocking your full-size GM SUV's performance potential. This American Thunder turbo-back exhaust delivers improved airflow for better throttle response and...FLO17342- SKU:
- FLO17342
- Availability:
- Ships Same Business Day
- Weight:
- 66.80 LBS
- MFG Part #:
- 17342
$921.95 -
01-04 GM P/U 2500/3500 HD American Thunder Syst FLO17328
FLOWMASTER
$749.95If you're running a 2001-04 GM 2500/3500 HD, upgrading to a quality cat-back exhaust system is one of the most impactful bolt-on modifications you can make. The American Thunder system delivers...FLO17328- SKU:
- FLO17328
- Availability:
- Ships Same Business Day
- Weight:
- 56.90 LBS
- MFG Part #:
- 17328
$749.95Qty in Cart: 0Quantity:Price:$749.95Subtotal: -
99-04 F250/350 P/U Force II Exhaust System FLO17229
FLOWMASTER
$460.95If you're running a 99-04 F250 or F350, a quality cat-back exhaust system is one of the most cost-effective upgrades to improve throttle response, fuel efficiency, and engine longevity. The FLO17229...FLO17229- SKU:
- FLO17229
- Availability:
- Ships Same Business Day
- Weight:
- 47.15 LBS
- MFG Part #:
- 17229
$460.95
