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Header questions

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Blazer Forum >> Modifications >> Performance & Brainstorming >> Headers, Intake, & Exhaust >> Header questions

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Header questions - 3/24/2008 1:24:00 PM

bitbandit

Posts: 102
Joined: 9/16/2007
From: Brigham City, UT
Status: offline

I am looking to install a new exhaust for the blazer, looking at magnaflow cat and muffler with 2.5" pipe.
i am wondering about headers though, i found some OBX headers on ebay, $295 + $32 for shipping, they seem liek a good deal, now the question is are headers a good mod and also what is air injection?
because they have some headers on there with and without it.

_____________________________

2001 ZR2 Auto. Trans.
AirRaid Intake
March Pulleys
W4M Tune

Post #: 1

RE: Header questions - 3/24/2008 2:37:22 PM

swartlkk

Posts: 14299
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

If you have air injection (search for it), then you either need headers with the proper provisions for both AIR and EGR or you need to have your PCM editted to remove the AIR system and only need the EGR provisions.

_____________________________

Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to bitbandit)

Post #: 2

RE: Header questions - 3/24/2008 6:54:13 PM

Logan

Posts: 50
Joined: 11/21/2007
Status: offline

What the hell is air injection?

(in reply to bitbandit)

Post #: 3

RE: Header questions - 3/24/2008 7:08:39 PM

swartlkk

Posts: 14299
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

AIR == air injection reaction. It is an emissions system that is supposed to boost the efficiency and life expectancy of the catalytic converter by injecting fresh air into the exhaust before the catalytic converter. To remove this system, you must have your PCM modified to remove the AIR system DTCs.

_____________________________

Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to Logan)

Post #: 4