Okay. Heres the deal. I have always heard alot of good things about K&N air filters and accessories. I recently bought a 1995 z71 with the 5.7, and 11 miles to the gallon isn't really ideal. So I asked some buddies, and some said get a cold air intake. So I look around on this site, and quite a bit of people do not seem to think that a cold air intake will do anything. Others go as far to say that K&N air filters/intakes are bad for motors. Will a cold air intake do anything for gas mileage?? Would exhaust do more?? And if a cold air intake, is K&N a bad choice?? There are so many varying opinions, and I can't seem to make up my mind which is correct.

Thanks

 

ok try and saty with me hear,
cold air is denser then hot/warm air you would want to use cold ai, but on the other hand if you live where its cold all the time, a cold air intake will do nothing at all for you.
now as far as the exhaust,
just adding a tip will do nothing, if you put a catback then youll find a better gain.
good luck!!

 

Cold air intakes will give some HP, but at the cost of fuel mileage. As 95k1500z71 said, cold air is more dense than hot air, meaning more air is entering the intake when its cold, the vehicles computer tries to acomplish an air\fuel ratio of 14.7:1. So if more air is entering the intake, the computer will add more fuel to keep the ratio correct.

 

i have a 2008 hd with 6.0,purchased the gm performance cold air induction.i love it,more hp and increased my mpg 3-4.also i have flowmaster dual exhaust.stick with gm on the cold air, i have sevearl friends who have done the same thing and all report from 2-4 more mpg.