Generally speaking, installing a higher-flowing muffler will benefit almost any motor vehicle, so that kind of mod on your Pathfinder is neither unheard of or hard to find. It's a generic power-adding mod that works for everybody.
http://cgi.ebay.com/ebaymotors/ws/eB...category=38634
http://cgi.ebay.com/ebaymotors/ws/eB...category=38634
http://www.4x4parts.com/public_html/...roduct_id=2763
http://www.tuneshops.com/order-1-1-1-1-12208.cfm
Finding these took me about five minutes. Maybe you just need to look harder or use a different search engine.
__________________
Admin of NPORA, mod for Nissan-Infiniti Forums, NissanForums.com, NissanHelp.com, AllNissans.com and VGPowered Forums
'88 Pathfinder: 6" of lift, 33x13.50 Swamper LTB's, Rancho 9000's, L&P Stage 3 steering system, K&N, Pacesetter headers and 2.5" exhaust, Lock-Right locker, 110A alty and electric fan swap, dual batteries, 700W+ worth of PIAAs, etc.
|