santajay

Gents-
Thinking of installing electronic exhaust cutouts.
SL65 with Renntech ECU - what's the stock pipe diameter?
I thought it was 3" but some threads are showing 2.5"

Has anyone installed them? Pros? Cons?

Thanks-

ItalianJoe1

Its a metric size closer to 2.75" exhaust tubing, 3" should work, 2.5" will be small/restrictive.

There are vids on youtube. Depending on your choice of cutouts, some have a tendency to sound like a small exhaust leak when closed, can be obnoxious, but depends on the car, placement of the cutouts, design, and owner awareness.

The cars sound fantastic with open cutouts, a bit loud but not that bad due to the inherent muffling effect of the turbos.

santajay

Thanks again!

boostd

Just do a muffler delete. The 65 is way too quiet from the factory. I loved how mine sounded with downpipes and the muffler delete.

Vendetta

Did this introduce any drone - like any at all - or other undesirable results INSIDE the car? Outside I'm sure it sounds much better. Wish there were more videos of our cars with this mod like you did.

-V

V12TTenthusiast

I did cutouts on mine trust me if you drives yours alot muffler delete might annoy the **** out of you. I did 3 inch qtp cut outs but my whole exhaust is a custom 3 inch mandrel bent exhaust with catless down pipes and hi flow muffers. Catless downpipes alone makes it a much nicer sound but nothing compared to the likes of catless downpipes and open cutout on WOT

boostd

No drone and I loved the sound inside and out. The turbos help keep the car quieter, as did the cats my car had.

coldhammer

Do you have a video of how this sounds?

braddman

No cats, no mufflers, mine is loud as **** and droney with the top down.