Exhausts

[Belly1987]

Hi Everyone

Thinking of changing my exhaust setup.

I have a 35i MHD Stage 2+

Catless Down Pipes
Secondary Cats still in
Longlife Mufflers/ Tips

I’m Thinking of straight piping from the secondary cats. And going working quad tail pipes.

Has anyone done this?

Any cost estimations / pics / videos.

Cheers

Mark

 

[mcbutler]

I recommned VRSF catless downpipes.

https://www.mlperformance.co.uk/collections/bmw-z-performance-parts-e89-z4/products/evolve-bmw-n54-downpipes-135i-335i-next-day-delivery-_pos-1-_sid-d33ada811-_ss-r?variant=39904542730

Catless downpipes are a very tight fit, just a few mm between pipes and subframe. I strongly recommend you get a very reputable dealer to fit them. its a complete pig of a job and if they are not exactly right you will be chasing exhaust blows and knocks forever. They also change the exhaust tone of the car drastically, not to everyones taste.
You will get around an extra 25BHP from VRSF pipes, I had celtic remap my car after fitting so its dyno proven on my car.

If I was on stage 2, I would be looking at upgrading my intercooler before doing exhausts personally...

 

[Belly1987]

Hi Mark

Ive already fitted VRSF Catless Down Pipes And Wagner Intercooler, hence looking at the back part of the exhaust now.