Jetex spent a day at VAG specialists Jabba to test our large bore downpipe and sports cat for the VAG 1.8T engine. The car used was a Golf Mk4 1.8T with a Stage One Revo re-map kit and V6 4 Motion trim. Everything else was standard. The car’s owner Cameron kindly volunteered his pride and joy for the test. We wanted a car that was not heavily modified already. His car fitted the bill perfectly with a switchable Stage 1 Revo kit and standard exhaust.

The plan was to rolling road the car under 6 varying conditions (runs):

• Run 1 Stock exhaust with the Revo kit switched off.

• Run 2 Jetex cat-back system (including mid-box) with the Revo kit switched off.

• Run 3 Jetex downpipe and sports cat and cat-back system with the Revo kit switched off.

• Run 4 Stock exhaust with the Revo kit switched on.

• Run 5 Jetex cat-back system (including mid-box) with the Revo kit switched on.

• Run 6 Jetex downpipe and sports cat and cat-back system (without mid-box so one silencer only) with the Revo kit switched on.

Figures were recorded for each run to see what gains would be achieved by fitting a free flowing, larger bore Jetex exhaust system and downpipe/sports cat.

For more information, please click on one of the thumbnails below: