Gev

Stock Z28 exhaust, with a cutout.

LIL SS

iTrader: (9)

Here is a video of my car with the cut outs open.

12.44 pass bumping the limiter in first.

someday

c'mon people, the word is QUIET, not quite... and the D/D is probably the quietest, i had a 2OTL on my LT1 and it was pretty loud...

dug

iTrader: (10)

I get that with my 1OTL exhaust. With the crusty single turndown and blackd out z28 badges its hard to tell that the camaro is a z.

SLP LS1

NICE

5150Z28

I just installed an SLP dual/dual with a custom 3" ORY and I would definitely consider this a sleeper exhaust setup. It is nowhere near as loud as when I ran the y-pipe with cats and a 4" Mufflex.

WTB-a-Hawk

Do firehawks come with the SLP dual/dual? or do you buy it from somewhere? Newbie here, sorry.

2xLS1

iTrader: (25)

The SLP Dual Dual is standard on Firehawks and a Y2Y option on the SS. I have it on both of my cars.

WTB-a-Hawk

Another newb question. Some people say they have SLP d/d, and 3" ORY. The 3" ORY is an aftermarket piece correct? What comes from the factory on a hawk? Shoot while i'm at it, what is an ORY, i think it stands for off road Y pipe, but why is it offroad pipe, and not an Onroad pipe? Sorry so many stupid questions.

00blkws6

Off road because there are no catalytic converters.

WTB-a-Hawk

So catalytic converters are "cats", I'm pretty sure that with no cats, your system will be louder correct? , also will not having Cats, give you more power then having them?

00blkws6

Yes, catalytic converters are "cats", yes your system will be louder, and yes...more than likely even a good "cat" will steal some of your horsepower.

SouthFL.02.SS

...and then there's gutted cats...

Pro Stock John

iTrader: (34)

98 1otl with ORP and headers is very quiet. That combined with an optional cutout is very stealthy.

Colonel

QTP headers, stock Z28 exhaust and tips, no cats, a QTP electric cuttout. This setup made 423 RWHP through an A4 tranny with a 224 cam and LS6 heads and ran 11.20 at 121 MPH at 3525 lbs.

FAST LS1

iTrader: (2)

Yep the ultimate sleeper exhaust has to be the stock muffler, it can quieten down even the most ground pounding engines. Combine that with a cutout that you can open after you've lured someone into thinking the car is a V-6 and it's about as stealth as it gets.

8POTS

I keep reading about cutouts. I like the idea or electric cutouts too.

Questions though. Do they tend to leak at all?, do they actually make power? (and not cause flow probs open or closed?) ,are they legal when closed and a good seal exists. ( I doubt they are legal in any form here in Australia but curious about state laws there) , and can they be fitted easily to any car and be reasonably inconspicuous on 1st inspection?

hehehe...I suppose more than anything I like the idea of switching on a crackly open exhaust at will and switch it off again without any effort.

superchannelkev

iTrader: (8)

i got the edelbrock setup. the tips dump right before the bumper on the highway it sounds stock and when you get on it, it screams. it looks like a v6 exhaust, the 200hp dual turn down style

BADSZ28

iTrader: (39)

You can't be any stealthier than with your stock exhaust with an electric cut-out.

BADSZ28

iTrader: (39)

If they leak, I can't tell, but to ensure a good seal most people put a bead of silicone around the valves seal. With intake bolt-ons you will notice a difference at top end emidiately. After about 100 miles the bottom end comes in and you better get a trans mount and torque strap. As long as you don't break your local sound laws your legal weather its open or closed. They can fit any car you can weld it into and as long as they don't lay on the ground to look, no one will see it. It's like driving with a nitrous bottle. It's OK to be there, you just can't push the oh-**** button.