Eisenmann race+Catless x-pipe...Primary cats on

[BURAKUSTA]

Hello,my problem is in the video for me the sound is orgasmic but i have drone and primary cats are still on the car,so i am asking if i delete primary cats and put secondary oem cats back on,what can change in performance,sound and especially drone ?

[cwidjojo]

Fuk i miss that set up. I had the eisen race with primary cat delete (tms test pipe) and i noticed that with the test pipe, drone got better in the 3k rpm range b/c u could hear the sound of the engine (the rasp) that the test pipes create block the low frequency noise that the muffler alone creates. By all means, it wasnt quieter, just less bassy low frequency that used to annoy the hell out of me. But below that (say 2k), the car rattles more than before.

That said, i cannot compare betw secondary cat delete vs primary b/c i nvr had my sec cat deleted, but i'd assume u would make more power with primary cat delete bc thats the most restrictive part of the exhaust system more so than the sec cat.

[BURAKUSTA]

[BMW1986]

I have the same setup only with a Sport Exhaust. Sounds dope as is but that sounds redic!

[THE TECH]

I have the Eisenmann Race with the Akra Evo x-pipe. Definitely doesn't sound as raspy as that.

[BURAKUSTA]

So how is the sound good or bad ? And what will change if i remove primary and add secondary cats.

[Shmelgy]

Originally Posted by BURAKUSTA

So how is the sound good or bad ? And what will change if i remove primary and add secondary cats.

Remove primaries, add secondaries and resonators.

[WamsleyH]

I had the eisen race with primary cat delete

[the_road_less_traveled]

Originally Posted by WamsleyH

I had the eisen race with primary cat delete

Does it have a raspy sound? I'm having a hard time finding vids online. The x-pipes I head sound raspy which IS NOT what I'm after.