my new stainless steel exhaust is fab !! its really quiet so i should meet the noise regs - i got a static of 93dB from BTB and a drive by of 91dB at less than 5m at 5.5k revs in 4th at about 80mph (normally would have driven that bit in 5th but i wanted to make it as noisy as possible)
BTB were very helpful and even changed the back box midway through the installation as the one they had made up in advance for me resulted in high noise. It was quiet expensive but worth it in the long run as i dont need to worry about being too loud now !
BTB EXHAUSTS -buy one !!
Moderator: martauto
Is yours an E30 m3?
nope - its a 325i E30 1987ish. see more at www.greenbmw.co.uk. think it might even be a 2.7 but the history is a bit sketchy. the compression is also quiet high which made it harder for BTB to get the noise down.
Thier exhausts are just brilliant as are their 6 branch manifolds for the M20's.
I heard racecars car the other day and it was well impressive especially the noise of the new 6 branch and exhaust both from BTB.
I only sell their manifolds on the shop.
Thier newest 6 branch made a whopping 18bhp on a standard car!
I've supplied around 6 since 19th Jan when they were released to me.
I heard racecars car the other day and it was well impressive especially the noise of the new 6 branch and exhaust both from BTB.
I only sell their manifolds on the shop.
Thier newest 6 branch made a whopping 18bhp on a standard car!
I've supplied around 6 since 19th Jan when they were released to me.
yeah - they tried to convince me to buy a new manifold as well !!! i dont really need the power increase though - i need to learn how to drive better and also set up the suspension / handling !!