Just Bob
Junior Member
Installed Kooks 35101110 Torque Series Shorty Headers today. Six hours in Mac's Custom exhaust. I had already modified the Y pipe at Mac's. I have to tell you, this job would be pretty tough without a lift. I tried. The previously installed Lyell's muffler (shown next to stock) cut a lot of weight and gave it a good sound with a resonator delete. The Y pipe mod removed a bad restriction, and the headers were going to be for torque, not high RPM runs.
Bottom line - Kooks are expensive, are solidly and professionally fabricated, ship as a kit with hardened bolts, dipstick spacer and double layer stainless gaskets and directions.
They fit well, bolt directly to the stock Y pipe, retaining EPA mandated convertor locations and do not have a drone while in MDS mode. They are pretty quiet, with an even rumble that is better than the manifolds they replaced.
They are also the only headers I know of with a lifetime warranty for the first purchaser. Do not wrap them or that warranty goes away. Move the hoses on the passenger side up away from them. Photo shows hoses unclipped. You will need to remove the steering link on the driver's side to get them in. No need to dismount dipstick - kit has a spacer.
Butt dyno says a solid increase (estimate 30 ft/lbs) in torque at around 4000 rpm. No CEL, but may throw truck on a dyno soon to get the most out of these.
I could not DIY this and ended up at Mac's.
I would do this again.
Bottom line - Kooks are expensive, are solidly and professionally fabricated, ship as a kit with hardened bolts, dipstick spacer and double layer stainless gaskets and directions.
They fit well, bolt directly to the stock Y pipe, retaining EPA mandated convertor locations and do not have a drone while in MDS mode. They are pretty quiet, with an even rumble that is better than the manifolds they replaced.
They are also the only headers I know of with a lifetime warranty for the first purchaser. Do not wrap them or that warranty goes away. Move the hoses on the passenger side up away from them. Photo shows hoses unclipped. You will need to remove the steering link on the driver's side to get them in. No need to dismount dipstick - kit has a spacer.
Butt dyno says a solid increase (estimate 30 ft/lbs) in torque at around 4000 rpm. No CEL, but may throw truck on a dyno soon to get the most out of these.
I could not DIY this and ended up at Mac's.
I would do this again.
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