- Too big diameter (80mm/3.15") to be used on NA cars with single sided exhaust & factory tip spacing (3-1/8") - so no fit on BMW Stock or BMW Performance muffler. You almost have to use no bigger than 76mm/2.99" (unless a custom setup) - otherwise I would have picked these up.
- Will fit on NA single-sided exhaust when using REIkon, Remus as they have 3-3/8" tip spacing, so there is room to go bigger with the tip diameter and still have them clear one another.
- They would work just fine & be the same for E90/92 as far as dual outlet/single tip setups go...
Prolly got them thru E46Fanatics forum off of DTM-Spec.net
Good price as these are $90 shipped from mfg.