I'm after a set of downpipes. Any one selling a set, or OEM cats that I could have gutted, or able to recommend some? I note VRSF, KWE-racing.de, AR and supersprint all due Z4 specific sets. Not 100%sure the difference between the 335i and Z4 but research is suggesting the flange perhaps.
The KWE-racing have a flexible section (like OE) which appeals given how low the 35iS and the fact the exhaust hands down a touch. When I contacted KWE however, they are not a bolt on a do require some cutting which might be a manufacturing fault, was unclear - there was a language barrier so hard to communicate.
Supersprint are simply an insane price at ~£1500 but they do have some flexi built in. AR are also very expensive at £700 + import tax and have no flex in design.
VRSF has no flex in design but are reasonably priced.
Not convinced by cat gutting.
Thanks, Rich
