Tormander

Was wonder what the differnce between a 4-1 header and a 4-2-1 header? Do they give different performances at different speed? Aslo i was planning to get a Catalytic Converter but i cant seem to find any for my cavalier 03. I did find this though http://rksport.com/product/p_020994005/view_detail but it says it doesn fit on an Ecotec Engine.

KJRich

I think, THINK, 4-1 headers give you best top end performance while 4-2-1 help retain your low speed torque. Someone will post soon and confirm this or correct me, I'm sure. It's still early in the A.M.

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1999 Chevy Venture LS Extended 3.4 V6 Intake Gaskets Replaced
2003 Cavalier LS Sport Coupe, 2.2 Eco, 5 speed Getrag, all black

slow_99integra

that is correct 4-2-1 header is better for everyday driving it makes it a little more fun. 4-1 header is better for drag racing it makes better top end power. 4-2-1 gives a broader power band while 4-1 give a more narrow power band.

Try rsmracing.com they have great stuff for j-bodies. When i had my 2.4L that is where i got all my stuff.

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They say "speed kills drive a Honda" I say "You're right"

"I'm a kid with a grown man's mind turning corrupt" Wu Syndicate

ImSoYesterday

4-2-1 is better for high end, undesputable truth.

inarifennec

eh I Was wondering the same thing myself. now I know. thanks guys

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Car - 2001 Chevrolet Cavalier z24.
2.4L LD9 with Catback Exhaust and Injen Cold Air intake. (Soon to be a High Output Intake) And a few Visual upgrades.

Former car - 1984 Nissan 200SX .... Died in a Tragic head on collision, the pizza delivery girl never saw me supposedly... ><