BIGCAM24

I put headers on my IS 300 after that I repaired an exhaust leak Then straight pipe and eliminate the mufflers all in the same day now the car will barely run what have I done wrong

jadu

iTrader: (42)

first off welcome, my brother ran everything you just installed and his car ran fine for many miles. the first thing I'd double check (if you havent done so already) is verify everything is bolted. Verify you installed the required gaskets and verify the O2 sensor connection. gl