【AS】Catless Downpipe

A 304 stainless de-cat downpipe. Straight through, no catalyst, the lowest back pressure you can run and the most efficiency you'll get out of the turbo.

A straight through de-cat design removes the restriction completely, so exhaust gas leaves the turbo with the least resistance possible. It's the most direct way to maximise turbo efficiency and top end power.

The AutoScience Studio de-cat downpipe is made from 304 stainless steel and works best alongside a remap. You'll notice the turbo builds boost sooner, the top end pulls harder and more linearly, and both the exhaust note and the turbo sound get a lot more aggressive.

▌ Specification
- Material: 304 stainless steel
- Type: straight through, de-cat, no catalyst
- O2 sensor bung included
- Direct fit, no fabrication

▌ Features
- Fully straight through, back pressure down to a minimum
- 304 stainless steel, resists heat and corrosion
- O2 sensor bung included
- Direct replacement for the standard downpipe
- Best results alongside a remap

▌ Compared with standard
- Catalyst and restriction removed, back pressure far below standard
- Turbo builds boost sooner, stronger top end, a much harder exhaust note

Fitment: Ford Focus 2.3 ST. Fitting available at our workshop.

⚠ For off-road and track use only. A de-cat will not pass an MOT emissions test in the UK.