What are the best set of runners that will give you the most HP on an 88' Iroc-Z (350). I was looking twards SLP, but if not does anybody have any suggestions THANKS.

 

check out Arizona speed and marine's semi siameesed (sp?) large tube runner. Most have come to the conclusion that they have the best runner on the market.

http://www.azspeed-marine.com/

 

The AS&M seem like to be the best set of runners out on the market if you can afford them. They seem to have the largest gains over all other runners. Another good set of runners are the TPIS Siamesed runners. They also cost a pretty penny. The SLP Siamesed runners probably run a close third but seem to run much better when they are slightly ported.

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1988 GTA 5.7L TPI Auto
355 ci. block,TPIS ZZ-9 Camshaft, SLP Headers, Borla Cat Back, B&M Holeshot 2400 Stall Converter, 3.73 Richmond Gears

"Why ride a stang when birds can fly?"

http://www.geocities.com/thegta

 

The TPIS and AS&M runners are the same thing!!! AS&M makes them for TPIS and then TPIS puts their name on it.

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87 Iroc 5.7, AFR190, SLP Cam(218/224), SLP 1 5/8 headers & cat back, Random CAT, SLP Runners (matched intake-runners-plenum), 48mm TB, 6E(arap) chip, Vigilante & Probuilt trans.

 

Yeah, but u can get them polished from AS&M.

[This message has been edited by IROCZTWENTYGR8 (edited April 21, 2001).]

 

AS&M, TPIS, and Accel are all good for stock and modified TPI. SLP runners work better with aftermarket heads and cam.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

91Z, why would SLP runners work better with a modded engine than AS&M's and others??

 

'Course at the price SLP is selling their runners for right now($199), they're hard to beat.

 

??

 

Plus you could fully siamese the slp's because they are cast. Extruded runners can't be worked.