Best place to buy a Magnaflow cat back from

How much power will the catback make over say just welding in magaflows?If its like 2HP then I dont think its worth it...my stock cat back comes out completely even...after we took a torch to one of the hangers and bent it a little LOL.Thats bad when you just get home from the dealership and have to break out the cutting torch on the same day.(the left side was like 3/4s of an inch low, maybe lower.I couldnt stand it even though I only had the car for a few hours LOL)
 
Guys,

Thanks for the kudos on Partshopper. Purchasing from Partshopper is what keeps this place (stangnet) free. Sales from Partshopper pays for all the servers, T1 lines and support for the staff.

We will beat anyone's price, every little bit keeps this place going. StangNet is a Magnaflow Distributor... support the site you love! ;)