Posted: Dec 29 2010 at 6:46pm | IP Logged

I'm looking to put a flowmaster on an 02 supercharged frontier...any ideas?

I think the in & outlets are 2.4 is that correct? Should I go with a single in & single out or what?? Any help would be great!

Dominick

Posted: Mar 02 2011 at 9:12am | IP Logged

Hey thanks for the reply. I put a Flow master 44 serious on it & in about 3 weeks or so you can here a big difference in the sound. I never thought about putting headers on the truck simply because I really dont care too much about horse power but if it would help with the gas mileage it mioght be worth the investment.

What did you have to change besdies the headers? I assum the rest of the exhaust going tback to the muffler would have to be changed right? How much did the whole thing cost you?

Posted: Mar 02 2011 at 9:54am | IP Logged

Here's where it gets better! You don't have to change a thing. The headers are designed to bolt on to your existing exhaust system. Don't get me wrong, getting the old manifolds off is something you want to have your local muffler shop do. Without a lift, I can't imagine how hard it would be. However, when the headers were in place, I called 4x4 Parts and asked them what size pipe was optimum for the headers, they told me not to change a thing, the headers were designed to work best with the factory  piping! By the way, these headers are probably the best built set that I have ever seen. The welding is perfect, and everything is extra heavy guage. I believe that with the headers, mounting hardware, gaskets, and studs I spent about $725.00. If you consider how much you are saving over a cat-back exhaust system, it's very reasonable. If you have someone else install the headers, make them give you a quote BEFORE they start. I watched two guys spend eight hours taking off the old manifolds and installing the headers. I paid them $350.00 to do the work, and I guarantee you I wouldn't have done it for twice that.  If you think you like the way it sounds now, just wait. It gets a lot better! It sounds more like an old Porsche 928 than an import truck. Great tone, and the throttle response is better from stop to OMG! Don't get me wrong, you won't run away from a Corvette, but you will shock a lot of Ford and Chevy guys with V-8's. There several aftermarket chips that also help with mileage and performance, but just take it step by step and find your own place to stop. You probably saw the monstrosity of a muffler they took off when you had your Flowmaster installed. Same goes for the pre-cats. Nissan build every truck they made to pass California emmisions. You aren't hurting a thing removing the first two cats. Just make sure you buy the "CEL eliminators" when you order the headers. Otherwise you will always have the check engine light on. I don't know about New York, but in Texas you can't pass emmisions testing if the light is on. The O2 sensors on your truck only read a differential in the exhaust gasses from the manifold to the catalytic converters, and believe me, all four sensors have to be hooked up for everything to work. Let me know if some pictures would help, I'm sure I have some around here close.