Shop cat-back systems, headers, mufflers, and exhaust components for your Audi S4 to improve flow, sound, and horsepower output.
CA $3,130.99
100 items in stock
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CA $1,444.99
100 items in stock
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MagnaFlow Exhaust Products
CA $2,865.05
100 items in stock
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Valvetronic Designs
CA $2,499.99
100 items in stock
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Valvetronic Designs
CA $2,499.99
100 items in stock
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Valvetronic Designs
CA $2,499.99
100 items in stock
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Valvetronic Designs
CA $2,499.99
100 items in stock
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Valvetronic Designs
CA $2,499.99
100 items in stock
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Valvetronic Designs
CA $1,999.99
100 items in stock
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Valvetronic Designs
CA $1,999.99
100 items in stock
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Valvetronic Designs
CA $1,999.99
100 items in stock
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Valvetronic Designs
CA $1,999.99
100 items in stock
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Valvetronic Designs
CA $1,999.99
100 items in stock
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Valvetronic Designs
CA $2,499.99
100 items in stock
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Valvetronic Designs
CA $2,499.99
100 items in stock
Select your vehicle to see compatible products and accurate pricing
Valvetronic Designs
CA $2,499.99
100 items in stock
Select your vehicle to see compatible products and accurate pricing
Valvetronic Designs
CA $2,499.99
100 items in stock
Select your vehicle to see compatible products and accurate pricing
Valvetronic Designs
CA $2,499.99
100 items in stock
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MBRP Exhaust
CA $2,223.51
100 items in stock
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MBRP Exhaust
CA $2,408.81
100 items in stock
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MBRP Exhaust
CA $679.40
100 items in stock
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