Product Overview
STIHL 660 DNO PERFORMANCE MUFFLER FACEPLATE
DNO FACEPLATES HAVE SLIGHTLY LARGER PORTS THEN THE CLUTCH SIDE EXIT.
BOLT-ON POWER - DYNO TESTED
SAW ENGINE RUNS COOLER
FITS: MS 660 / 066, Holzfforma G660
100% Stainless Steel
Polished Finish
TIG Welded
Removable Spark Arrestor Screen
This is just the faceplate not the whole Muffler
ALL PERFORMANCE SAW PARTS BACKED BY OUR LIFETIME GUARANTEE!
Installation: Stihl M-tronic saws will calibrate automatically, but a factory reset is recommended.
Non M-tronic saws MUST be tuned once installed.
Tuning with a digital tachometer, check RPM with stock muffler cover still on saw, swap stock cover install ported cover, check RPM with ported cover, set RPM back to stock original RPM
Stihl ms660 dual port muffler
