Speaking of the Air Box....Is the 06 box the same as the 07 or 08 box? I would assume that since the 07 has a bigger engine that the air intake would be a little bigger. Right or wrong?

 

I put on the fullk&n cai, i get better mpg and i can feel more power

 

I belive the '07-'08 intake is different due to new EGR or idle-valve plumbing rather than the displacement increase.

 

An ECM reflash with custom enginetune is supposed to provide the most improvement for the dollar. Many people have also done cia, exhaust, and ECM tune and have reported very noticable drivability gains. Don't forget to tell the engine tuner that you have cai and exhaust if you do the tune.

 

the 08 takes a square filter

 

Any change to your stock intake is an improvement, I have read and dealt with this argument forever. your Paper filter is designed to be restrictive in order to trap dirt. I read some where that the oil type cone filters are not good for the Hummer because the oil contaminates the sensors, i.e. MAF. The GM performance on is an AEM dry filter. The Resonator Box serves as two functions, one to reduce throttle/accelration noise andstores/maintains a volume off air to prevent that "Punch it" lag you might feel when you change out the box for the direct tube route.S&B filter sighthas a cool CFM calculator, it tell you the cfm flow per your Cu in to rpm rate so you can tune to the right size filter so you don't restrict your engine. As far as TB Spacers, the only one that I think is worth anything isfrom Hamburger Performance. And the final thought is It is all about what YOU want.

 

Oil is only a problem if you over apply it to the filter. If done properly it will never affect your MAF.

 

My MAF is clean as a whistle! Gunny has a point, there has been many a knuckhead to over oil their filter after cleaning and crud up the MAF. Really though, if you follow the K&N recharger pack (cleaning kit) instructions, and use common sense, my kids could do it.

There is also another purpose to the resonator box. It is to warm the intake charge in conditions of extreme cold, such as continuousnear zero F and below. GM built these things for service anywhere their off road capacity may be called upon for use. I leave mine on for the worst of the MI winter weather, although I acknowledge that it hardly could be called conditions of extreme cold.

 

 

Hello, Yes I have a Cobra but it's a totally different animal when you're dealing with a supercharged vehicle vice a normal aspirated motor. When I swapped the intake on my Cobra it netted 37rwhp on the dyno. The exhaust mufflers were also very restrictive from the factory. A CAI and Catback on a 03-04 Cobra was good for 50-60rwhp all day long on the stock supercharger boost level (8.5 psi).