Hey guys. I was wondering which headers are better, the Edlebrock TES or SLP headers. I have an '88 GTA Trans Am TPI 305. Everything is stock except for the flowmaster muffler, hypertech air foil and performance chip, and K&N air filter. so with these mods, would i expect to see a greater HP gain with Edlebrock or SLP? thanks.

 

Read this thread: https://www.thirdgen.org/messgboard/...ML/000599.html

SLP headers are better, in my opinion.

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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=-

 

EDELBROCK ALL THE WAY! Just make sure u get them coated.

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Eric Natzke
91 Firebird 305 TBI

ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-MSD Cap & Rotor-MSD Blaster Coil-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone-Free TBI mods
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

Anything but Edelcrock.

 

I will not pick a side.
But I installed a set of used Edelbrock TES headers on my 305TPI/Auto last week and I'm shocked about the power unleashed. The install was fairly easy, the motor wasn't moved and the starter was left in place. The Y pipe tucked under better than my stock Y pipe. The header flange is nice and thick, which resists warpage. I sand blasted mine system and than sprayed 1200 degree black VHT paint so far so good. the O2 bung is close to the heat and a heated O2 dosen't seem neccessary. After bolting on the air foils, pulleys, chip, Flowmaster over the years. the headers finally allowed those components to truly come into play. These headers really woke my 305 up. Yes I lost a little torque in the low range, but the gains in mid and upper are great. As for SLP I have experience with their headers on 4th Gens. They have good products and a good history of support. You need to look at 2 things price and future mods. All headers are a pain to install and their power difference is slight on lightly modded engines. Sorry about the long story and this is just my bloodied knuckle opinion.

 

I have the TES, and I am very happy with them. I do however think that the SLPs are better both in quality and performance, but I don't know if they are $100+ better.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)

Next on the list: LT4 HOT Cam

 

Edelbrock.

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89 FORMULA 350 Edelbrock Cat-Back ,March Pulleys,Super Coil,MSD 6AL ,Edelbrock TES's, AFPR ,Shiftkit, Edelbrock Base ,AS&M Runners, Edelbrock Waterpump, Fast chip,Crane Gold 1.6 RR's, BBK 52mm TB , MSD 22# Injectors ,9.5 Vigilante. Hoping for 13.5

 

I like the SLP headers. There are a pain to install but the results are worth it. Just my .02 cents.

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• 1987 T/A 350tpi, 5speed,SLP Headers,Stock 1995 Z28 Muffler, Gutted Cat,Compucam 2030 429 452 & 204 214,TbBypass,Ported Plenum,AFPR, SLP LCA,SFC. 13.86@96.4 with 1.96 60ft

 

On a stock motor used on the streat the edelbrocks are probably better for performance. But for ultimate top end hp you need to go with the larger primaries on the slp's.

 

In summit racing catalog, SLP's made more power on a 383 than Edelbrock TES.

 

Of course, I'm biased, I have the SLP's, they're bigger, stainless steel, better seal and gaskets, warranteed for life, and have 1 3/4" primaries. Bigger long-term power gains, and high-quality. Down side is their cost, good god, normally only Borla is that high I say go for the SLP's though, overall, I think you'll prefer them in the long run, although plug clearance will be an issue. Change out all that first, then install, use good platinum plugs and high quality wires. Good luck!



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Dan Young
1995 Z28/M6
Groton, CT

1985 Z28/A4
(Prospective purchase)

 

From the people I've talked to and heard on here, the plug access is better on SLP headers than on Edelbrocks.