Last time i went, i ran a 15.127 on the 1/4 mile with just CAI, header, stock open dump exhaust with stock tires. As of now, i got a side exit exhaust ( idea from a scionlife member ) with no cats, just straigh-through turbo muff and resonator. also, an ETD ( Ingalls ) is coming in the middle of this week before track time. I'm curious on what i can get now. Any estimated guests??? unless its all bout the way i drive that night ( which im guessing that you all will say )

 

you're probably not getting enough air coming IN to justify the lack of backpressure going OUT.

It will make more noise.

And your computer will probably not be happy.

 

the car still feels the same as if i was still open dump but if i do run bad times that night, im just gonna go aftermarket. the exhaust is a lil quieter b/c of the res but yea, its still loud as hell

 

It will still run the same. You haven't gained much more (if any) in HP to knock off that much off your time. Better driving is probably going to be the answer more than HP if your time drops.

 

yea, time dropped just a bit. but i think im done fixing this car up lol