Gentlemen (and Ladies),
I'm sure some of you have answered this question more than a few a times, but I'm new, so please bear with me. I have a '98 Blazer 4DR and am thinking about adding the standard K&N intake filter set up. Has anyone come up with any specific numbers on improved gas mileage? I'm doing it because it needs to be done, but I'd like to have the numbers just to see. Plus they'll appease the "ball 'n chain" when I talk fuel savings. Thanks.

 

nothing noticiable unless you help it exhale better.

 

No time for exhaust replacement yet. Thanks for the reply.

 

Are you talking the drop in k&n or the full intake? I put an intake and exhaust and seafoamed it and I'm seeing 4 right now with dirty old plugs new plugs I'm guessing 5-6 but thats also with an exhaust. I still have the stock cat on there too, aseems to be doing alright.

 

i put a drop in k&n filter and a flowmaster 40 muffler on my 00 4dr blazer and im at 18 mpg from about 16 or so.

 

Damn, that sucks I'm at about 22MPG with a straight through exhaust stock cat and FIPK

 

randonhero79, is the resonance from that 40 series flowmaster overwhelming inside your Blazer? Mine is still a family vehicle and as such I want to be able to carry on a conversation while other folks are inside. If I'm riding alone I'll never hear it over the stereo, so there's no worry...

 

with the 40 if u close the windows your fine....its loud but if u get it straight out the back its more external than anything

 

Thanks flowmasta.