Duplex stainless steel exhaust system 2 × 80 mm for VW Scirocco III — TA Technix

A complete exhaust system replaces everything downstream of the catalytic converter. Its main effect is sound: less restrictive silencers, a more pronounced low tone, and a more responsive-sounding rev range. In terms of power, the gain exists but remains modest on a stock engine, because the restriction in a production engine is mainly upstream - the catalytic converter and downpipe.

The second effect, less often highlighted and more long-lasting: weight and durability. A stainless steel exhaust does not rust, can still be removed ten years from now, and weighs less than a stock aluminized steel exhaust. On a car you plan to keep, it is the part you only install once.