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Flowmaster American Thunder Exhaust Systems

4.37 out of 5 stars 549 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
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 applications.

Results 1 - 17 of 17

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

Part Number: FLO-17328

4.39 out of 5 stars ( 18 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, CatBack, Steel, Aluminized, Pol. Tips, Chevy, GMC, Pickup, 4.8, 5.3L, Kit

Part Number: FLO-17395

4.83 out of 5 stars ( 12 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust System, American Thunder, Cat-Back, Split Rear/Side Exit, Stainless Steel, Natural, Ford, 4.6, 5.4L

Part Number: FLO-817663

4.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Stainless Tips, Chevy, Pontiac, 5.7L, Kit

Part Number: FLO-17199

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust System, American Thunder, CatBack, Steel, Aluminized, Polished Tips, Dodge, Pickup, 5.2, 5.9L, Kit

Part Number: FLO-17429

4.29 out of 5 stars ( 7 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

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

Part Number: FLO-17312

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust System, American Thunder, Cat-Back, Steel, Aluminized, Dodge, Pickup, 5.2, 5.9L

Part Number: FLO-17171

4.17 out of 5 stars ( 6 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Resonator, Polished Tips, 3.8L, Kit

Part Number: FLO-17358

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

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 ( 2 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, CatBack, Steel, Aluminized, Pol. Tips, Chevy, GMC, Pickup, 4.8 5.3L

Part Number: FLO-17392

4.57 out of 5 stars ( 7 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, CatBack, Steel, Aluminized, Polished Tips, Chevy, GMC, Pickup, 3 door, 4.8, 5.3L

Part Number: FLO-17428

3.5 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Polished Tips, Chevy, GMC, 4.8, 5.3L, Kit

Part Number: FLO-17368

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust System, American Thunder, Cat-Back, Steel, Aluminized, Polished Stainless Tips, Toyota, 4.7L, Kit

Part Number: FLO-17425

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust System, American Thunder, Cat-Back, Steel, Aluminized, Heat Shield, Tip, Chevy, GMC, Pickup 2500, 6.0L

Part Number: FLO-17325

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, Steel, Aluminized, Resonator, Tip, Chevy, GMC, 5.3, Kit

Part Number: FLO-17342

4.75 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust, American Thunder, Cat-Back, Steel, Aluminized, Polished Tip, Chevy, GMC, Pickup 1500HD, 6.0L, Kit

Part Number: FLO-17350

3.13 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Exhaust System, American Thunder, Cat-Back, Dodge, Pickup, 4.7, 5.9L, Kit

Part Number: FLO-17476

Not Yet Reviewed

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

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