So how did the install go? Your impressions of the X51 headers in terms of performance? Do you have high flow cats and aftermarket mufflers as well?
Install was quite easy except for one bolt on rt header which was hard to line up because of a hose and a couple of exhaust nuts that were a little tricky to get a socket on! Took me about 2 hrs!
Only change so far is a bit throatier tone with the PSE. Standard Cats, no noticeable performance change, nor did I expect any
I am hoping for a little better gas mileage, probably in vain. System sounds great and headers can't