The guy I bought my sport seats from is a dealer tech near Baltimore, I was able to have him install my 3-stage intake manifold & bmw 'performance exhaust' this week on the side at his dealership.
The stock manifold on the 325/328's is a single set of runners, where the 330 and some other cars got a manifold with a set of flappy valves that change the runner lengths as the car moves through its powerband - swapping it into a 325/328 is a direct swap and the wiring is already in place, its clipped to the side of the stock manifold even. The factory HP rating is +25hp on the 330 over the 325 and there's no other changes to the motor.
![[Image: 8559879970_f66017b439_b.jpg]](http://farm9.staticflickr.com/8392/8559879970_f66017b439_b.jpg)
I'm glad I got those done, and along with the intake manifold I had him install a high flow air filter and a silicon intake tube to replace the section from airbox to throttle body, removing the stock resonator in the process which kills some noise. I'm really happy with the changes so far and from what I've read the tune should be a pretty solid improvement.
I should be able to get the tune on the car in the next couple of days, my flash loader is here.
![[Image: IMG_0271-XL.jpg]](https://photos.smugmug.com/Galleries/BMW-328-Wagon/i-LgbMBj5/0/96ecb312/XL/IMG_0271-XL.jpg)
![[Image: IMG_0269-XL.jpg]](https://photos.smugmug.com/Galleries/BMW-328-Wagon/i-MQ8sTqd/0/9ebe1932/XL/IMG_0269-XL.jpg)
Not my car, but a good sound comparison between the two - its much throatier than the stock one with some pleasant volume to it. It sounds like my old E36, so in short I spent a lot of money to make it sound like an old busted BMW with a 150k mile muffler.
I need to figure out what I'm doing with my suspension, probably a Bilstein shock/spring kit to start and see how I like it. If I want more there's the option of doing swaybars, too - but to get to the rear the subframe has to be dropped and if you're getting in there might as well replace the subframe bushings with M3 parts. The stock ones are really squishy and its a bit unsettling cornering over bumps. Supposedly M3 bushings solves it with no increase in NVH.
The stock manifold on the 325/328's is a single set of runners, where the 330 and some other cars got a manifold with a set of flappy valves that change the runner lengths as the car moves through its powerband - swapping it into a 325/328 is a direct swap and the wiring is already in place, its clipped to the side of the stock manifold even. The factory HP rating is +25hp on the 330 over the 325 and there's no other changes to the motor.
I'm glad I got those done, and along with the intake manifold I had him install a high flow air filter and a silicon intake tube to replace the section from airbox to throttle body, removing the stock resonator in the process which kills some noise. I'm really happy with the changes so far and from what I've read the tune should be a pretty solid improvement.
I should be able to get the tune on the car in the next couple of days, my flash loader is here.
Not my car, but a good sound comparison between the two - its much throatier than the stock one with some pleasant volume to it. It sounds like my old E36, so in short I spent a lot of money to make it sound like an old busted BMW with a 150k mile muffler.
I need to figure out what I'm doing with my suspension, probably a Bilstein shock/spring kit to start and see how I like it. If I want more there's the option of doing swaybars, too - but to get to the rear the subframe has to be dropped and if you're getting in there might as well replace the subframe bushings with M3 parts. The stock ones are really squishy and its a bit unsettling cornering over bumps. Supposedly M3 bushings solves it with no increase in NVH.