Flowmaster American Thunder Exhaust Systems

4.37 out of 5 stars 534 Customer Reviews

Flowmaster American Thunder exhaust systems are designed with the latest exhaust technology available--resulting in improved acceleration, passing power, and fuel m

Flowmaster American Thunder exhaust systems are designed with the latest exhaust technology available--resulting in improved acceleration, passing power, and fuel mileage. A key to these performance upgrades is Flowmaster's use of mandrel-bent tubing, which allows superior exhaust gas flow. The systems also feature mufflers (single or dual) that deliver plenty of the rich Flowmaster sound you expect. Components are built from stainless steel or aluminized steel; and some models include tips. American Thunder exhausts are available in more than a hundred configurations for fitment on specific truck and car application

Results 1 - 25 of 108

Flowmaster American Thunder Exhaust Systems 17119

Exhaust System, American Thunder, Crossmember Back, Steel, Aluminized, Buick, Chevy, Oldsmobile, Pontiac, A-Body, Kit

Part Number: FLO-17119

4.25 out of 5 stars ( 36 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1972 C10 PICKUP, C15/C1500 PICKUP - 817654

Exhaust System, American Thunder, Header-back, Dual, Stainless, Split Rear/Split Side Exit, Chevy, GMC, Kit

Part Number: FLO-817654

4.59 out of 5 stars ( 17 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1970 MUSTANG - 17281

Exhaust, American Thunder, Split Rear, Steel, Aluminized, Polished Stainless Tip, Ford, Kit

Part Number: FLO-17281

4.64 out of 5 stars ( 11 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1968 CAMARO, FIREBIRD - 17129

Exhaust System, American Thunder, Header-Back, Steel, Aluminized, Chevy, Pontiac, Kit

Part Number: FLO-17129

4.23 out of 5 stars ( 22 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 817940

Exhaust System, American Thunder, Crossmember back, Dual, Stainless, Split Rear/Split Side Exit, Chevy, GMC, Kit

Part Number: FLO-817940

Not Yet Reviewed

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1969 CAMARO, FIREBIRD - 17201

Exhaust System, American Thunder, Header-back, Steel, Aluminized, H-Pipe, Chevy, Pontiac, Kit

Part Number: FLO-17201

4.78 out of 5 stars ( 9 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 17742

Exhaust System, American Thunder, Header-back, Dual, Steel, Aluminized, Split Rear Exit, Chevy, GMC, Kit

Part Number: FLO-17742

4.11 out of 5 stars ( 9 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 17200

Exhaust System, American Thunder, Header-Back, Steel, Aluminized, Buick, Chevy, Oldsmobile, Pontiac, A-Body

Part Number: FLO-17200

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1972 F-100, F-250, F-350 - 817938

Exhaust System, American Thunder, Header-Back, Stainless Steel, Ford, Standard Cab, Kit

Part Number: FLO-817938

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1972 C10 PICKUP, C15/C1500 PICKUP - 17654

Exhaust System, American Thunder, Header-back, Steel, Aluminized, Split Rear/Split Side Exit, Chevy, GMC, Kit

Part Number: FLO-17654

4.33 out of 5 stars ( 12 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1966-1968 CAPRICE, 1965-1968 IMPALA - 17655-FM

Exhaust System, American Thunder, 2.50 in. Diameter, Crossmember Back, Super 40, H-Pipe, Steel, Aluminized, Chevy, V8, Kit

Part Number: FLO-17655-FM

Not Yet Reviewed

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 817895

Exhaust System, American Thunder, Cat-back, Single In/Dual Out, Stainless, Natural, Chevy, GMC, 5.3L, Kit

Part Number: FLO-817895

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1970 MUSTANG - 17282

Exhaust, American Thunder, Split Rear, Steel, Aluminized, Ford, Kit

Part Number: FLO-17282

4.47 out of 5 stars ( 15 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 17328

Exhaust System, Force II, Cat-Back, Steel, Aluminized, Polished Tip, Chevy, GMC, Pickup, 6.0, 8.1L

Part Number: FLO-17328

4.59 out of 5 stars ( 17 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1986-1991 CAMARO, FIREBIRD - 17233

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Polished Stainless Tips, 5.0, 5.7L, Kit

Part Number: FLO-17233

4.11 out of 5 stars ( 9 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1999-2004 MUSTANG - 17312

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Polished Stainless Tips, Ford, 4.6L, Kit

Part Number: FLO-17312

4.88 out of 5 stars ( 8 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1967-1972 F-100, F-250, F-350 - 817934

Exhaust System, Crossmember Back, Dual, 2.50 in., Ford, Kit

Part Number: FLO-817934

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 17435

Exhaust, American Thunder, CatBack, Steel, Aluminized, Polished Tips, Chevy, GMC, Pickup, 2 door, 4.8, 5.3L

Part Number: FLO-17435

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 17382

Exhaust System, American Thunder, Header-Back, Steel, Aluminized, H-Pipe, Dodge, Plymouth, B-Body, Kit

Part Number: FLO-17382

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1994-1997 MUSTANG - 17212

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Original Style Tips, Ford, 4.6, 5.0L, Kit

Part Number: FLO-17212

3.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1970-1974 CAMARO, FIREBIRD - 17149

Exhaust System, American Thunder, Header-Back, Aluminized Steel, H-Pipe, Chevy, Pontiac, Kit

Part Number: FLO-17149

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Jun 16, 2025 if ordered today

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Estimated Ship Date: Jun 16, 2025 if ordered today

Flowmaster American Thunder Exhaust Systems for 1987-1996 F-150 - 17471

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Polished Stainless Tips, Ford, Pickup, 4.9, 5.0, 5.8L

Part Number: FLO-17471

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems 17202

Exhaust System, American Thunder, Header-back, Steel, Aluminized, H-Pipe, Chevy, Pontiac, Kit

Part Number: FLO-17202

4.63 out of 5 stars ( 8 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1986-1993 MUSTANG - 17213

Exhaust System, American Thunder, CatBack, Steel, Aluminized, Original Style Tips, Ford, 5.0L, Kit

Part Number: FLO-17213

4.61 out of 5 stars ( 18 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

Flowmaster American Thunder Exhaust Systems for 1987-1993 MUSTANG - 17116

Exhaust System, American Thunder, Cat-Back, Steel, Aluminized, Ford, 5.0L, Kit

Part Number: FLO-17116

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 6/9/2025

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Estimated Ship Date: Monday 6/9/2025

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