Apex_The_Master

Hi everyone. First time here. I just picked up a bone stock 04' red auto 350z. I only drove the car for 3 days before doing my first few mods.

I recently had the cats removed, had a strait pipe welded. Resonator removed as well. I purchased a pair of o2 sensor extenders, which i've used in all my vehicles to avoid the p0420 code.

Since I don't know this car so well It may be in my head but I feel a loss of power now around the 2000-3200 RPM area.

Is it just me?

So to sum up now I have No cats, No res, o2 sensor spaced and a stock muffer.

I've heard a ton about back pressure, maybe since the cats are gone the exhaust is clashing at the y-pipe?

Could use some expertise on the matter.

Thanks!

travlee

iTrader: (8)

you lost low end torque by cutting out the cats, not to mention you are prob running lean now. you could get it tuned to help it out some

ARRRT

I felt the same lost of torque after test-pipes install
Go tune your Z as travlee said

travlee

iTrader: (8)

we have a rocket scientist, what did he think by removing everything

https://my350z.com/forum/engine-and-...wbie-here.html

HCO_surfer

Sounds like a redneck to me.... You might want to sell that beater you just bought and get something that's not covered in plastidip.