Im trying to get some more HP out of my 3.4 without going internal. How much HP should I expect to gain off performance headers going to my 3" flowmaster exhaust?

Do you need to change your O2 sensors or can you use your old ones?

Ok well Ive decided on the Pacesetter headers 1993-1995 Pontiac Firebird - Pacesetter Headers - Black Painted

Would these flanges bolt on to my 3" flowmaster or do I need to get those adapters?

answer to both possibly 10-15 hp to the wheels and toull probably have to down size (yes modify) to you flowmaster 3 in cuz that looks like its ment to bolt right up to your stock exhaust which is original 2.5 " intermediate pipe (aka over the axle pipe) or the pipe your trying to connect to,

plus performance w/o internal mods...
cold air intake
bigger throttle body
bigger injectors
1.6 roller rockers instead of stamped 1.5 rockers
nitrous
nice computer tune (also usually yeilds better mpg's)
adjutable fuel pressure regulator
underdrive pulley system
electric water pump
180 degrees thermostat

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94' Z28: #07-503-8 COMP CAMS CAMSHAFT. HOOKER HEADERS & CROSSFLOW NO CAT,11:1 COMPR MICKEY THOMSON E/T DRAGS, 370HP/410FTLBS

More like about 5rwhp. This is a 3.4 v6 not a 5.7 v8.

Huh?

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