[Penn999]

Originally Posted by Iwantm3

If ill find a good exhaust pic of e92 I'll show you, do you have a pic by any chance ?

Of my exhaust? if so here it is. NOT MY ACTUAL CAR. Just for refference. http://www.activeautowerke.com/pdf/A...structions.pdf

[Iwantm3]

Uploaded with ImageShack.us

[Penn999]

Originally Posted by **335i**

so cats can be deleted and mufflers left as it is or no?



i was talking about stock 335 exhaust do i just delete secondary cats and leave mufflers as it is http://img46.imageshack.us/f/oem20exhaust.jpg/

For the most hp, I would buy a new exhaust and both are changed/removed. You will still gain a couple whp with the cat deletion on the stock exhaust. The stock mufflers are a little more restrictive than aftermarket mufflers(shape/design/size). You will have to cut and weld the mid pipe into the stock one is why I didnt go this route. AND because they are like 2-2.5 inches wide as opposed to a wider 3inch. Sounds if FAR different. Mine is a lot louder than stock.

[Iwantm3]

This part seems very restrictive no ?

[Penn999]

Originally Posted by Iwantm3

This part seems very restrictive no ?

I agree, thats why I replaced the whole system...

[**335i**]

as i understand stock exhaust pipes diameter is 2.5"? does pipes of BMW 325 sedan or BMW 320 sedan or BMW 315 can be used instead of my cats if i delete them i just need 2 pipes each about 30 cm

[scalbert]

Originally Posted by **335i**

as i understand stock exhaust pipes diameter is 2.5"?

Stock exhaust is 60 mm = 2.362 inches. 2.5 inch stainless tubing slips over the stock exhaust piping though it takes some force to do so.