My 2001 GT has 105,000 miles on it and is need need of new mufflers. I plan on replacing the whole cat back system as the resonator is pretty rusted and will most likely eventually go as well.
Here is the problem and question. My stock Grand Prix has mandrel bent pipes. I plan on replacing everything with Walker OEM parts but the bends are not mandrel they are the bent bends with the ridges. Will this make a difference in performance? Should I even worry about this?
Also, Advance Auto'* website says the Walker part fits but does not give the inside or outside diameter of the pipe. Does anyone know the diameter? Part #55204 I need to buy clamps for all the pieces as I intend to do the work myself and do not have a welder or even know how to use one.
I've been looking for the least expensive option and have found it with the Walker system. I have to buy all the parts separately on Advanceauto'* website but will be around $310 w/o tax for (2) mufflers, y-pipe, and resonator. I will need to buy clamps and such and refinish my existing tips if I can. The least expensive "cat back" system that would fit according to multiple auto sites was a magnaflow which was over $800. The magnaflow is 2.5" pipe however. I still cannot find a pipe size for the Walker. It may be 2.25" - will this make a difference compared to 2.5" mandrel pipe?
I just received a quote from Cole Muffler & Brake for an AP catback system w/o tips. They have all 2 1/4" pipe, mandrel bends and will clamp everything together. The resonator and muffler have a lifetime warranty and the pipes are one year. The total for parts and installation was $395. If I wanted to buy the parts only from them it would be $365 but no warranty on any of the items.
Just to get a comparison I called Monro Muffler & Brake and they had the exact same system w/o tips installed for $907!
Anyone know why Cole can get and install for so cheap????
Shoot... One thing I didn't ask is what style the system components were. I'm assuming they will give me the cheapest stuff AP has. Will it be any good and hold up to WNY winters?