I want to get edelbrock headers(don't try to convince me to get SLPs, don't have enough money) for my 91 Z28 305 TPI automatic. It has a 2 1/4" in and out cat. My catback has been modified to fit my cat. Should I get a 3" cat? What kind and how much? My car has to remain emissions legal. Would a 3" cat make a big difference? Should I coat my headers, don't want to spend to much money, no jet hot coating. I need a cheap alternative. Do I really need to coat them I live in Oakland in the summer and Santa Barbara during the school year, so my car doesn't see any bad weather. What should I do? Thanks in advance for any help.

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'91 Z28 305, Auto trans, K&N filters, power pulleys, ported plenum, hypertech chip, hooker cat back, kyb shocks, STB, 14.7@ 93 mph.

 

Theres been alot of discussion about the quality of headers....I suggest you browse through them.

You can also coat the headers yourself (again, look through past threads on this topic)

Three reasons why you should coat headers:
1-extends life
2-channels heat away from engine
3-looks VERY nice

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92 Camaro RS LO3, 5-spd, T-tops
Mechanics:
Open Air Element w/K&N Filter, Flowmaster 3" Cat-back Exhaust, Z28 Grille w/aftmkt fog lamps
Electronics:
Alpine 8030 Alarm System, Valentine One Radar Detector (How did I ever drive without one?), Pioneer DEH 7450 Head Unit w/6-pack CD changer, Pioneer DEQ 7600 Sound Processor, 2 Kenwood KAC-90 Amps powering 2 12" Pro Red subs and 4 Infiniti speakers.
NEXT UP: SLP 1 3/4" Headers/Y-pipe, Centerforce Dual Friction Clutch kit

 

If you still have an old cat on there I highly suggest an aftermarket 3inch. Just another addition that will maximize the use of headers. With my TES headers, I first sandblasted them,then gave them a couple coats of 1200 degree black paint (VHT). So far they are holding up well.

 

If you want to spend some serious $$ for the cat, the Random Technology one is the best, if not, Catgo cats are sold in Summit for around $60 I think.

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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

 

I think I will get the SLP's(guys at CamaroZ28.com changed my mind). If I don't get the installtion kit what do I need to order or buy elsewhere? What about instructions, will someone e-mail them to me? Since my cat is 2 1/4" should I just buy a cat that will fit the 3 inch pipe and have someone weld it together for me, or should I buy the cat adapter for $30? Does anyone know when I would get the headers? Sorry for all the questions. Thank you to all who responded.