budgreen3564

I found an old thread on this, with not a lot of information.
Has anyone done this like they do on the show “Bitchin’ Rides”

eddie-d

madrob2020

Lots for sale on Ebay. Look under exhaust system electric cutout. Also easy find on net, Youtube, for installation. Numerous car vendors, Jegs, Cultrag (maybe-etc.). Most exhaust shops probably would do it for not a whole lot.

budgreen3564

Kindigit said to install after O2 sensors and before mufflers. They sell their units.
Any affect on warranty?

Mr. Gizmo

budgreen3564

No one has done this?

Mr. Gizmo

JHEBERT

I did it a dozen years ago on my C6z, dumped just before the rear cradle. Cool factor because of sound, minimal HP gains. (4hp at the 585rwhp N/A level)

budgreen3564

Just looking for sound. No hp gain

ZR1Bob

Don't know if this will help much in the world of C7s, but I am one of the guys who did this on my '95 C4 ZR-1. Pretty extensive postings on the ZR-1 Net Registry forum, but here are a couple of pix. Several in our group did cutouts and most did them where the spare tire carrier would normally have been, where the pipes curve outward towards the mufflers. I wanted to keep my spare so I located the cutouts directly in front of the rear mufflers. In the ZR-1 exhaust systems the mufflers are the biggest bottleneck and can cost about 20-25 hp. I used cutouts from Quick Time Performance and bought them through Summit. I discarded the large toggle switch they included and fashioned my own. Used a rocker switch hidden under the carpet on the passenger side of the console. Details on the ZR-1 forum, and there are several threads here in the C4/ZR-1 forum like this one:https://www.corvetteforum.com/forums...er-bypass.html. Search for cutouts.

I decided to do this finally after years of loud exhaust systems I wanted to have the ability to have a quiet system or a loud one with better performance, not one all the time. I dumped the (excellent) Corsa system I had used on both ZR-1s for years and went to a stock '95 exhaust (which has a high-flow resonator and the cutouts in front of the stock mufflers. Stock quiet when closed and able to set off car alarms and scare pets and small children when wide open. (I had headers and no cats). I normally ran about 1/3 open for a nice rumble around town. Of course the ZR-1 had a much simpler exhaust system than the C7, but I hope that helps a little. --Bob

eddie-d

I found these two videos with cutouts on the C7. At least these offer ideas as to where to install the cutouts.

https://m.youtube.com/watch?v=Aqz_1q_HRt0


https://m.youtube.com/watch?v=CaVB4h00i8A

Mr. Gizmo

Satanspawn

Not really sure what the point of doing cutouts is when you can change the volume through the touch screen. Seems like a total waste of money. I have offroad pipes and an x-pipe. Pop it in stealth and I'm quiet as stock, put it in track and the gates of hell open wide.

Kingtal0n

Electric cutout is the most fun mod I've ever done to any car.

I always do it now to my new turbo projects.

Basically I use a stock-ish quiet "turbo muffler" on the car, really makes it quiet like stock after a turbo. So you can start the car in neighborhood, avoid attention.

Then whenever you want, full blast open donwnpipe. Turbine whistle. Reduced backpressure. And a bunch of people trying to figure out what the F@(#* that was.

Higgs Boson

you should install those cutouts before the turbo and sound even cooler.

yur2slo

I have them on my C7Z; over 10k miles. Pretty much drive everywhere with them open. Also have the Corsa x-pipe. Will get some pics tonight.

davepl

I watched a local shop build a MUCH nicer setup than what people like Kindigit usually do but I don't think we'd have room under our cars.

What he did locally was to install the cutout in front of the muffler, but behind the O2 sensor, then route the dump's output around the muffler and back into the tailpipe. On the one pickup I saw (which of course is a lot different for packaging from a Z) the straight pipe was the staight path and the muffler'd path was the "bypass", so it can be done both ways.

So, when bypassed, you're not dumping you're getting straight pipes, which sounds nicer. And I guess that's pretty similar to what our mufflers already do internally.

But I thought it was a cool setup with no ground dumps!

Warp Factor

That's what I thought too. Looking at cutaway views of our stock mufflers, they're pretty much straight though with very little sound deadening when the flaps are open. I suppose one could get a rawer and louder sound if the cutouts were closer to the engine.

Satanspawn

For all intents and purposes, cutouts on the C7 are a waste of money.

Bill Dearborn

If you have the NPP system the C7 Z06 comes stock with cutouts. Go into the settings menu and program the exhaust into Track Mode the outlet valves stay open all the time. Straight pipes by touching a screen and it is all stock. Don't even have to futz around pulling a fuse.

Bill