Question for gearheads

[CAP1]

ah ok, was told differently by a mechanic that i no longer use. i wonder if my 04 pontiac alero has that capability  i'd like to switch out the air filter for a k&n setup, toss in some hi-perf plugs on competition wires, maybe even some hi-perf ignition modules if they exist, and pop on some headers and hi-flow cat...the 3400 v6 is perky but sucks gas like a ford pickup.

those 3.4's should get decent mileage.

 definitly go with the k&n......can't go wrong with them. before spending money on the plugs/wires, etc, check your o2's. you'd be totally shocked at how much they can affect fuel consumption.
 also, if you've not had the fuel injectore cleaned, and have more than 50k miles........do one. motorvac. it works wonders. don't let anyone talk ya into the run rite one though.

[bagrat]

as long as you're not running a turbo, getting rid of backpressure can only be good. allowing your engine to exhale more easily, allows it to inhale more effeciently, thus gaining a better atomization of the air/fuel mixture. this will increase power, and mileage. it's a win/win/win really. and if your cat's got over 100k on it, you'll notice a good difference. if you do this, install new sensors with it.

yup no turbo here, this is sounding like it will definitely be a good addition.Thanks Ill go ahead an get them sensors while i'm at it.

[gyrene81]

those 3.4's should get decent mileage.

 definitly go with the k&n......can't go wrong with them. before spending money on the plugs/wires, etc, check your o2's. you'd be totally shocked at how much they can affect fuel consumption.
 also, if you've not had the fuel injectore cleaned, and have more than 50k miles........do one. motorvac. it works wonders. don't let anyone talk ya into the run rite one though.

motorvac fuel injector cleaner? i'll look for it. engine has 90k+ on it and i'm willing to bet it's never had the injectors cleaned. thanks for the suggestion. friggin gas mileage is 20 city/28 highway which sucks as far as i'm concerned. i've gotten 20 mpg city out of a 428 cobrajet in a ford f-250 4x4, a little v-6 should be able to do much better.

[olds442]

on many 4 cylinders, the cat is just off the manifold such as pictured. it helps keep the cat hot enough to keep it working more efficiently.

the sad part is that i still see people....even kids.....that think it's a good thing to take the cat(s) off of their car. they don't realize that todays cats rob no power whatsoever.

I would do it to make envermentalist mad