87GN06GTO07IRL

Don't mess with him then. I have a 76mm on my 11 second GN. That thing might hit 9's as light as it is. A 55mm puts out 450 whp on a 2.0 so his car has to be sick.

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<-- Guess which ones quicker?.....Nope! Not even close.

Ehrgeiz X

We were talking numbers the one day, and I remember it being pretty damn low, but I can't recall exactly what it was. He does have alot of problems though. He torqued the hell out his frame because he was being a dumbass with it. He's swapping his whole engine and set up into a newer body (still around a '98 or so)

As for Seer's cut outs, there shouldn't be fitting issues since they'll be installed just behind the headers, but the only question in my mind is if your cats are in a different spot than normal due to your manifolds.

The quick and easy way to find out is find a local shop with a lift and put her in the air and take a look. Shouldn't be too hard to figure out your install spots and fitting issues from there. I've seen corvettes mount them aft of the cats in the bends that bring the pipes back towards the center of the car as they run down the center to meet the mufflers. It was a good set up, and allowed for maximum flow with the cut outs open.

Just be careful with the cutouts. I hear WOT with them open can cause some damage to your engine due to the loss of back pressure

rspiller1

I have SLP loudmouth 1 cat back setup on mine with stock manifolds and it is loud but sounds amazing. I am always getting compliments on the tone

svede1212

FWIW "upgraded" manifolds don't do scavenging like tuned headers do. Chambered mufflers are what were developed for old muscle cars like Camaros and Cobras. They are more of a straight through design. classicchambered.com and sweet-thunder.com are two examples.

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2004 Blk/Rd M6


SvedeSpeed OTRCAI|!MAF|HP Tuners|SLP LTs|FTI cam|SLP UD|243 Heads|BBK 80mm|2.5" Exh

Rip Shift|DSS shaft|Diamond Stg3 |Lovells |Koni|Harrop|SuperPro bushes|Pedders|Hotchkis|3.91s

Ehrgeiz X

Hmm... Speaking of straight through, do you know anyone who's ever tried cherry bombs on an LS series? I know the old 5.0 mustangs sounded pretty gnarly with them, so I can only imagine what a goat would sound like. (not to put ford or GM together like they're the same thing )

JoeandReeseGTO

My brother has an 04 Gto. His is obnoxiously loud. Pace setter longtube headers, xpipe, no cats and super 40 mufflers custom fabbed in with original tips.. Holy cow it sounds like a NASCAR at full throttle. My Gto sounds like my mini cooper by comparison.

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gto_grl1982

Hey..I'm looking into getting an exhaust for my 04 m6 gto pretty soon, but there are so many choices out there. I'm glad to hear that you went with an SLP Loudmouth. There have been other people to tell me that I wouldn't go wrong with an SLP Loudmouth.

The Seer

Vice versa, I try and read your's in an American accent, Just kidding.

The Seer

Cherry Bomb!! Now there's a name I haven't heard in years!!! They used to be popular with the youngsters back in the 70's and 80's Mk 1/Mk 2 Escort era!!

billyjack2

Spintech superpro streets are loud and sound pretty good with no cats.

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2005 GTO - cyclone grey, Kooks LTH, catless mids, SLP CAI, Spintech 9000 mufflers, Koni shocks

2004 Dodge Ram 2500- Twin compound turbo 62mm/75mm >700rwhp **Broke rebuilding bigger**

Predator tuner and slp LM mufflers for sale.