K1 + Milltek cat back

[Stupra]

Dont seem to have heard the definitive gain in BHP & torque by fitting a cat-back Milltek exhaust.

Just checked some old threads, didnt seem too helpful, as alot have replacement cats, dowmpipes etc.

Got a remap on the car, and now, wondered if anyone has had rolling road tests of before & afters??

Anyone??

 

[Rob GTI]

The consensus is that the cat back is merely for sound and looks, there are no BHP gains to be had, thats where the sports cat and downpipe come in.

 

[Al]

Full system with no remap gives 10bhp. Most of that gain will be down to the downpipe.

Mine jumped from 257bhp to 267bhp with a Carbonio and Full Milltek (same rolling road).

I would love to see the gain that an intake alone would give to the Cupra. I am willing to bet that the likes of a Dbilas would give as much gain on a stock car as a Full Exhaust would although I have never seen any proof of it. The OEM air intake is very restrictive.