ClayMan
07-23-2007, 01:39 AM
They have extremely low mileage - I bought them with only ~20000km (or 12000mi; it was a US car) to put in my 325is. OBDI cars have a restrictive midsection (there's a "Y" choke point) whereas this one is twin-tubed all the way through, so it flows much better.
This is also a huge upgrade for 318/320/323's which have even an even more restrictive single tube all the way from before the cats back - this midsection combined with a dual-inlet muffler (i.e. one from an M3, which are cheap these days) will free up a significant amount of hp. It's dyno-proven, just look it up in bimmerforums.
Unfortunately I never got around to installing it, and since I'm probably trading in for a 328is, I wouldn't be needing this anymore. Due to the low mileage, I'd like $200 OBO for it.
This is also a huge upgrade for 318/320/323's which have even an even more restrictive single tube all the way from before the cats back - this midsection combined with a dual-inlet muffler (i.e. one from an M3, which are cheap these days) will free up a significant amount of hp. It's dyno-proven, just look it up in bimmerforums.
Unfortunately I never got around to installing it, and since I'm probably trading in for a 328is, I wouldn't be needing this anymore. Due to the low mileage, I'd like $200 OBO for it.