M3 e36 Backbox?

[mikey2011kat]

Will the e36 m3 3000cc back box fit onto my 328i sport e36?

[Babu 01]

No. The bore sizes of the pipes are different.

You could piss about cutting, sleeving & welding the two together but that's a lot of effort for zero performance gain.

[mikey2011kat]

Thanks for that saves me wasting money on wrong back box.

Do you know where i can get one cheapish for my 328 but with the m3 look??

[Babu 01]

You could get a new pair of chrome tips from the dealers for around £15 and fit them slightly staggered to follow the line of the diffuser as on the M3.

Or it'll be about £200 and a long wait for a Supersprint backbox on ebay.

[disco!!!!]

it is possible to fit a M3 back box to a 328i but you will have to get a reducer made to connect it to the 328i cat section as the M3 back box has a bigger bore compared to the 328i item

however the complete M3 exhaust will fit on to the M52 engine but you will need to get the complete exhaust. manifold, cat section and the back box

should you wish to go down this route then it would be better to get the 3.2 exhaust manifolds and cat section as they have the lambda sensor bosses welded into the manifolds, the 3.0 lambda sensors were mounted infront of the cats

then you will have the joy of fitting it which from what i have read is a bit of mare, space is limited and the steering knuckle will need to be split to create some room
i have a M3 EVO exhaust sitting in my garage ready to go on to my 328i and im dreading fitting it

[4rephill]

Pretty much the same conclusion as for your other thread: http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Babu 01 said:

.... a lot of effort for zero performance gain.

Seems to cover it.

(Out of interest, why the obsession with trying to get an M3 exhaust on your 328i when it's not going to gain you anything? ).

[rumple]

Noise, i did this on my old 328 and it really brought that 6 cylinder sound out.

[disco!!!!]

rumple said:

Noise, i did this on my old 328 and it really brought that 6 cylinder sound out.

this is why i did it too
i wanted a bit more noise but i wanted to avoid the drone that you get with aftermarket performance exhausts

[4rephill]

disco!!!! said:

rumple said:

Noise, i did this on my old 328 and it really brought that 6 cylinder sound out.

this is why i did it too
i wanted a bit more noise but i wanted to avoid the drone that you get with aftermarket performance exhausts

I assume you've already tried the golf Tee mod then?

[disco!!!!]

4rephill said:

I assume you've already tried the golf Tee mod then?

no not exactly
seeing as i have converted my 318is i never found out what the 328s sound like standard so the exhaust flap was already open

it did sound good but imo the M3 exhaust sounds way better and the revs build up quicker too

[rumple]

4rephill said:

disco!!!! said:

rumple said:

Noise, i did this on my old 328 and it really brought that 6 cylinder sound out.

this is why i did it too
i wanted a bit more noise but i wanted to avoid the drone that you get with aftermarket performance exhausts

I assume you've already tried the golf Tee mod then?

I tried the golf tee mod, m3 exhaust sounded far better, just done the golf tee mod and removed the under bonnet insulation on my 330 as well, thats far to retrained as well.

[M3Charlie]

Golf tee mod? Please enlighten me!

[rumple]

Dosnt work on an m3, just the lesser models, they had a flap on the inner tailpipe that opened above 3000 revs to bring out the noise, but below that would stay shut, this would increase backpressure and reduce noise, it has a vacum pipe on it, removing this pipe makes the flap stick open, making the engine note deeper, and improving the sound of the car.

[rumple]

P.S you have to block the air pipe with a golf tee, hence the name.