SLP Header?
SLP Header?
I picked up a set of SLP headers from a flea market the other weekend. The guy said they were for a third gen, but they have no y-pipe. They seem to have 1 3/4 primaries. Does anyone have any pictures of SLP headers and a y-pipe for a third gen that I can compare these to? I'm looking to get the y-pipe to install them on a single cat 1991. Any part numbers or pictures would be helpful. Thanks, Tim
Last edited by Tims91RS; Oct 17, 2007 at 10:12 PM. Reason: addition
Junior Member
Joined: Sep 2005
Posts: 34
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From: warennsburg mo. wafb
Car: 91 CAMARO Z28,91 GTA
Engine: 305 TPI modified, 350 tpi
Transmission: 700R4 modified
Axle/Gears: 2.73 (yuck), 3.23 posi
Re: SLP Header?
i have a gta with a set of slp headers, but i have dual cats. i know headers are supposed to be the best headers for a 3rd gen, i would go for the dual cat set up. you will get more flow, and a bit more hp
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: SLP Header?
Here's a shot of my old SLP's when I got them. We modified the air fitting screw-on so it would work like stock:
Supreme Member
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Joined: Sep 2003
Posts: 6,859
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: SLP Header?
Might check with Dyno Don in the SoCal section. His headers are based on the 1 3/4" SLP versions but with improvements. He makes y-pipes in both the single and dual cat versions.
Senior Member
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Posts: 860
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From: Tallahassee, Florida
Car: '86 Trans Am and '03 S-10
Engine: 355ci and 4.3l
Transmission: 700R4 and NV3500
Axle/Gears: 7.625/3.42 Auburn and 8.5/3.08 Gov-
Re: SLP Header?
SLP has the y-pipes on clearance right now. Both the tri-y and standard shorty sets.
Heres mine #30005C Shorty with Y pipe, Stainless Steel, Coated header portion, Non-Emission, 1 3/4 Primaries and I bought the 3" to 3" slip-fit adapter,

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Heres mine #30005C Shorty with Y pipe, Stainless Steel, Coated header portion, Non-Emission, 1 3/4 Primaries and I bought the 3" to 3" slip-fit adapter,

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Last edited by Mikz86TA; Oct 18, 2007 at 12:21 AM. Reason: Automerged Doublepost
Re: SLP Header?
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Joined: Jul 2003
Posts: 582
Likes: 205
From: DFW
Car: 90 Formula 350
Engine: 350
Transmission: 700r4
Axle/Gears: Dana 44 3.54
Re: SLP Header?
Dyno Don closed business and is hopefully enjoying retirement. Right before retiring he made me a SLP 2.5" Y-pipe so he only made a couple of these
after cleaning and Bill Hirsch high temp spray paint
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: SLP Header?
I am still making those and headers and other y-pipes.
Couldn't get away completely.LOL
Couldn't get away completely.LOL
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