I have a stock 1984 L69 trans am I am going to get the headers from SLP. Do I need to get the catalyst adapter and the istallation kit also? Thank you Kevin

 

I think that you will need it. The kit includes all sorts of requiered parts. I would call SLP and ask them to be sure though

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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 Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.3 @ 97mph
(corrected for elevation)

 

you will need something. the y pipe has no flange. if you have a cat on your car you will need something to hook to it.

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"I don't trust anything that bleads for five day's and doesn't die"
88 iroc slp headers,borla catback,procharger to come soon.

 

There installation kit is expensive you will save some money if you buy everything you need at your hardware store or speed shop .And to hook the Y pipe to your cat you will have to buy there adapter ,single cat adapter part no is 30038 ( 3 inches in diameter ).

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1987 IROC w/T56 and a 383 TPI in the works

 

WHAT IF YOU HAVE A DUEL CAT ????

 

I bought mine used without the AIR provisions and was wondering if anyone knew if the stock manifold bolts will work or if I need to go get new ones, and what length I will need.
Also when GMHIGHTECH magazine put them in magnum TPI they said a three wire O2 sensor is needed and angled plug boots.

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89 Iroc-Z
L98, cat_back, no cat, K&N, 3.42 gears, airfoil, shift kit, accel everything, B&M megashifter, useless JET II chip
Coming SLP headers, pulleys, afpr, drag radials