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Audi 3.0T supercharged high flow cats compared with test pipes for S4, S5, Q5 and SQ5
Audi 3.0T

Test Pipes vs High Flow Cats: Which One Fits Your Audi 3.0T or 4.0T?

Test pipes or high flow cats? This decision guide compares flow, sound, smell, check engine...
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Catless test pipe style downpipe for Audi 4.0T SQ7, SQ8 and RSQ8, illustrating catalytic converter test pipes
Audi 3.0T

Catalytic Converter Test Pipes: What They Are, Risks and Who They Suit

Catalytic converter test pipes replace your cats with open tube. Here is what that really...
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Audi 3.0T test pipes with dual-layer heat shielding for the supercharged EA837 V6
Audi 3.0T

Audi 3.0T Test Pipes: Our V2 Heavy-Duty, Heat-Shielded Series

Most Audi 3.0T test pipes are thin, raspy and cook your engine bay. Here is...
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