This is the newest design Walbro intank pump designed for installation in GM applications making the old 340M pump obsolete. This pump is designed to support high HP applications approaching 600 HP and has already run in the 10's on a Grand national yet is a bolt in unit. Comes with installation hardware included. The old GSS340M was a GSS340 (Mustang pump) that was machined down (that is where the M comes from) Walbro found it was not cost effective to continue to machine the pumps and made a new bottom with the correct opening for GM cars. For a better fit and installation.
Walbro's georotor design is able to produce high pressure while maintaining important high volume output. The positive displacement design allows Walbro fuel pumps to be quiet, efficient and very reliable, so relaible they maintain a QS9000 certification so you know the quaility is there.
Install kit includes:
Hot Wire Installation Instructions