Increasing Horsepower

[stevefitz03]

hey guys i have a 99 camry le 3.0 1mzfe 5 speed. I am looking for the most noticeable change in horsepower that i can do (without putting a trd supercharger on the engine) any ideas? Im asking because ive been doing research but so far what i found they do not make much for these engines as far as aftermarket products

[PortugalFocus]

I have the same engine and trans package as you, I think the biggest gains are noticed from the a factory downpipe replacement. So a set of headers, downpipe and cat delete (pending where you are for state inspecions) are your best options. I think the OE cat back and muffler flow pretty well in stock form.

[stevefitz03]

have you put headers and downpipe on your engine ? my only concerns with that is removing my air conditioning unit and getting a smaller radiator to make room for the new headers. Im a guy who likes his ac haha...and if u did put headers on your car what brand did you use ?

[Chris Crash]

You don't need a new rad or AC pump for the headers. OBX headers are on eBay.

You're not going to really find much in terms of horsepower increases. Unless you go custom. But you're not willing to do that it appears.