Review on Dorman 674-659 Exhaust Manifold with Integrated Catalytic Converter: Non-CARB Compliant | Best Deals by Robert Demissie

Get it! If you have a 2002 - 2005 Nissan Altima - then take this thing! Make sure you pair this with two NGK (Japanese) O2 sensors with blue and green plastic connectors - not that Bosch crap that's giving poor readings after six months on the road. Keep in mind that Altima is finicky about checking engine codes - which means you'll be driving with bad stuff for nine months before the code fails (tons of gas wasted and oil burned). Just do it! I can't believe in performance recovery; I was burning oil at a rate of 30 days that increased to 90 days (but that's my situation). I'm religious about 90 day oil changes - so don't compare my madness. Be careful and stop thinking you have serious engine problems until you know for sure. OH! - I didn't rebuild the heat shield because I'm the chief mechanic and I know the exhaust pipes are freaking hot. Sincerely.