my friend told me that having the slp loudmouth exhaust or straight pipe on the Ls1 will wear out the engine valves faster..Is that true? will this type of exhaust cause the valves to to wear out and weaken? any comments?

 

no

 

Yea thats like a wives tell. Im not sure why all the "back in the day" drag racers say this. I have heard it by so many people too. Truth is theres been tons of guys running straight headers or just straight pipes for years with no problems.

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Rob Jenkins

-95 M6 Trans Am-
Mods: Hooker Longtubes, CSI electric waterpump, Flowtech 3in cutout, Grenatelli MAF, 1LE intake Bellow, Flowmaster exhaust, 17x9 Niche Rims, Homemade CAI, Homemade Ram Air scoop, TB bypass, 1LE elbow, NGK TR55's, Taylor Plug wires.

-Best G-Tech times-
13.30 @ 110mph lots-o-wheelspin (G-Tech is a little high on MPH's I would be happy with a 104-5mph trap) I know I need some real Track times

1/8 mile track time:
8.435 @ 84.3mph with a 2.0 60ft
http://www.fortunecity.com/silversto...9/13140800.jpg


http://www.fortunecity.com/silverstone/renault/219/

 

More or less the guy who told you that should be working as the guy who cleans port-a-johns after a nascar race..and not have any real connection with any kind of job in the automotive field..
lets hope this is true

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DaveD
The Phantom of CamaroZ28.com
1998 WS6 #207
1998 Regal GS
"Snoogens"

Http://PhantomTA.cz28.com

I am a proud supporter of.... "Boycott Lapeer Dragway"...

 

Maybe what he was thinking was running headers with no cats and a traight pipe. with no back pressure you could burn the valves, but with the cats on and just a straight pipe its just loud. I have a slp loud mouth and its the ****. I recommend it. only paid 325 from ls1motorsports.

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Scott Parkinson
2001 Sunset Orange Z-28
SLP Loud Mouth, K&N, Mass Air, 160 Thermistat, Power Programmer, All aftermarket suspension/braces, 8.5mm Plug Wires, 125 hp Shot. Runnin low 12's all day.

 

That's probably what the person who told him was talking about, burning the exhaust valves if you don't have any back pressure.

Anyone know if race mufflers would give enough back pressure with true duals?

I want to try it on my Nova but my dad keeps convincing me not to so I don't burn my valves.



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1978 Nova 4dr, wanna-be SS
-Fixing massive rust.
-Stock 305 for now.
Future hopes:
-Mild 350, Twin Turbos after college.
-TH700R4
Street Sleeper

 

Even headers with straight pipe all the way back creates some back pressure, I'm pretty sure even with long tubes you are okay with straight pipe.

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-Evan Bangs
1998 Trans Am - 5.7L V8, A4, 3.23s, Lid, MAC Mid-length Headers and Off-road pipe, SLP Loudmouth, Tinted Windows, Yellow Painted Calipers, Chameleon Blue-Green paint.

Pics of my cars, friends, etc.

 

If you run cats, there is your back-pressure.

and I don't believe that statement to begin with, look how many people have been running around for years with borlas wide open or cut-outs. That's the same thing.

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2001 Camaro SS A4 #4586
Mods: Holley Powershot Filter, WaterWetter, MSD 8.5mm Super Conductor Wires, NGK TR55's, Shaner S2 Polished TB, SLP LT Headers, SLP Loudmouth, SLP Airlid, SLP Bellows, SLP SFC's, 160-Tstat, !FRA, !TB, !MAF Screen
Coming Soon: Baer Eradispeed Cross-drilled & Sloted Rotors, Yank PY3600E, Spohn Adjustable Torque Arm
E-mail: eyedol_2000@yahoo.com

 

Does The SLP Loud Mouth "pop" when you rev it up or get off the throtle quick?

 

only time mine pops is when I'm decelerating from around 4 grand in 3rd on the highway, or around the same rpm in 2nd.