WTF, I though that SLP headers with the single cat had dual 2 1/2" pipes into a single 3" y-pipe. The guy at SLP told me the pipes were 2 1/4". ??????? What is the real diameter, please help!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Recently Ported Heads, Installed Larger Race-Flo Valves and RPM Air Gap Intake (No new times)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

The real diameter is 2-1/4". That is the only bad thing about SLP headers. They have wimpy collectors (2-1/4") that mate to wimpy Y-Pipes (2-1/4"). Not good for us guys pushing some serious horsepower.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

What the hell! Edelbrock uses a dual 2 1/2" y-pipe with small primaries and SLP uses large primary pipes with a small 2 1/4" y-pipe. What the heck is that!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Recently Ported Heads, Installed Larger Race-Flo Valves and RPM Air Gap Intake (No new times)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

dual 2.25" has more area than the single 3" pipe its going into. What are you complaining about?

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

The SLP collectors are 2 1/2" that necks down to the 2 1/4" y-pipe. I just built my own custom 2 1/2" y-pipe.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I'm complaining about the available volume of the exhaust I JUST ORDERED! The exhaust works just like an intake plenum. Volume can equal increased exhaust flow if a certain limit is not reached and I know our cars need all the help they can get. Not only that but the farther down you move the restriction in the exhaust the less impact on performance.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Recently Ported Heads, Installed Larger Race-Flo Valves and RPM Air Gap Intake (No new times)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

[This message has been edited by CamaroMike (edited May 08, 2001).]

 

ah ic the problem since you already bought them. I missed that part. sorry

 

What to do!?

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Recently Ported Heads, Installed Larger Race-Flo Valves and RPM Air Gap Intake (No new times)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

maybe if you call them and sound really pissed they'll send a bigger Y pipe. Aren't their Y pipes for stock manifolds dual 2.5"? I think my Hooker headers Y pipe is dual 2.5" maybe you can get that and put on your SLPs? but its not stainless steel maybe Kevin can have his dad make you a 2.5" Y pipe too. Jegs has the "Y" part of the Y pipe that has dual 2.5 to 3", dual 2.25" to 3", or dual 2.5" to single 3.5". The connections look great and are made by Flowmaster, they go for about $40. Maybe you can get some U bent tubing and have the rest of the Y pipe made up. Dunno that's all I can think of at the moment. Its too damned hot over here.
-Tas

 

Well, SLP has no other y-pipe and I liketh stainless steel. SLP says their exhaust will support 480HP, I guess we will see. I am going to run my car at the strip with Edelbrock exhaust then change to SLP and compare the difference. It will be interesting.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Recently Ported Heads, Installed Larger Race-Flo Valves and RPM Air Gap Intake (No new times)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!