ok check my post in the v6 board wooo hooo i got 406 power,i did a swap in my 89 bird with a 71 400 punched to 406 with edelbrock rpm heads,now i need a good exhaust system for it.must be a dual exit too i want yer opionion from the headers all da way back to tips?wuts your recomendations?i want a nice deep throaty sound too loud ness dont really matter and im gonna put cats on it,i was thinkin true duals with full 3inch mandrel bent pipes,sound good? lemme know thanx you guyz see ya


mark

 

You are going to be hard pressed to get true duals. The floor pan on the drivers side needs to be crunched in order to get duals by. Your best bet is a set of 1 7/8" headers and a nice single 4" flowmaster from mufflex. They make dual outlets for only the 3 1/2" setup, I think. Checkem out at www.mufflex.com

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1986 CAMARO Z28 -> 151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframes connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH Next mods-> Homemade ram air, B&M shifter, Extreme Energy 230/236 cam, Holley Street Dom intake.

[This message has been edited by JDMZ28 (edited December 23, 2000).]

 

I think a good set of headers a custom 3" system w/o the cat and some sort of 3" inlet muffler like a Flowmaster 80 series or something like that would be enough to flow that beast. Thats a lot of flow right there. But true duals would be nice, just expensive and a pain.

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Eric Natzke

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

[This message has been edited by 91Bird305 (edited December 23, 2000).]

 

Dual 3 inch exhaust may be a bit much on a naturally aspirated engine. You will probably lose low end power, but have gains in high end power. I would go 2.5" dual if I were you, but that's just my opinion. Hope this helps.

 

I'd go with SLP 1 3/4" headers, no cat and a 3 inch mandrel bent cat-back from Hooker, Edelbrock, Flowmaster, ect.

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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