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Kooks Headers 4.2L inline Header Blowout!

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18K views 10 replies 6 participants last post by  The Neens 
#1 ·
Guys,
We have 5 sets of these Header and Connection Pipes in stock and need to blow them out. We have 3 sets of catted (6320) and 2 sets of off road (6321). Give us a call or one of our dealers on here for some smokin' deals!

Get Kookin with Kooks!!
 
#11 ·
Pretty happy so far with the header...O2 sensor wires had to be lengthened (I believe they offer an extension harness), trans dipstick was moved, some A/C lines had to be wrapped with Thermo Shield tape, muffler connection had to be modified to hook up to '06-'09 header...Low RPM power still feels laggy up to 3,000 (same as stock manifold), but above that it feels good...Exhaust tone at idle is a little louder and deeper, sounds much better...Sound volume while driving is as quiet as stock, no drone, but a lot of the straight 6 "flutter" is gone...I'm happy with the sound and power above 3,000...We keep good record of MPG, so I'll check on that, but doubt it'll change...
 
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