View: https://youtu.be/R2KOM1J2n3Q
3 inch whoosh catless dp
3 inch cpe catback
love the exhaust I think it sounds real good its aggressive when you want it to be but if you take it easy you can make it fairly quiet considering I'm catless and full 3 inch. And once you get on the highway it dont drone much at all not having a cat prob helps and also that helmholtz resonator on the back of the cpe catback really makes a difference. Well worth the 724 bucks I paid for the catback brand new shipped to my door. I really need to upgrade the exhaust mounts now that I have a full 3 inch exhaust it hits the underside of the car sometimes on bumps and stuff...now I see why everyone upgrades their mounts with a catback...never noticed any issues with the stock one but it was also 3/4 inch smaller.
highly recommend this exhaust setup and my car already being fbo x37 turbo on e30 with only the stock catback left stock...it really made a difference on my mpg. For some reason I'm consistently getting 3+ mpg better on average since the catback install. That is a sure sign the system is more efficient and likely picked up power (feels like it did and it spools up quicker and more effortless on the hit in lower rpms.)
the catbacks may not do much on stockish cars but on a car with a hybrid or big turbo that is flowing enough air to take advantage of a larger exhaust it definately makes a difference. I got 280 whp on vdyno with the same mods minus catback in 50 degree weather so now that weather is cooling down I am gonna log it in 50ish degree weather on the same road and see if my feeling is correct about picking up power.