Here is my combo:
92' LX
331 w/ tfs heads (9:1)
TFS stage 1 cam (1.7 rr's)
gt-40 intake w/65mm tb
s-trim (6lbs)
SCT MAF
UPR Power Pipe
SCT custom tune
mac unequal length headers
bassani OR x-pipe
mac cat back
I want to swap my Bassani OR X pipe with a catt'd Mac H-pipe to try and quiet the car down a bit.
How much power do you think I will loose by doing this?