THIS IS THE M4 FULL EXHAUST SYSTEM FOR THE YZF-R1. THESE EXHAUST SYSTEMS ARE HANDMADE AND CONTAIN FEATURES THAT WILL NOT BE FOUND ON MASS PRODUCED AFTERMARKET EXHAUST SYSTEMS. THESE SYSTEMS ARE MADE OUT OF 304 STAINLESS STEEL. THEY HAVE EQUAL LENGTH PRIMARY TUBES AND FEATURE 1 1/2" TO 1 5/8" TAPERED HEAD PIPES AND A 4 INTO 2 INTO 1 DESIGN. TAPERED HEAD PIPES HELP MAINTAIN EXHAUST FLOW VELOCITY THROUGH THE HEAD PIPES AND HELP RETAIN LOW END POWER. THE EXHAUST CAN END CAPS AND SILENCER CORE ARE ALL STAINLESS STEEL. THE SILENCER CAN BE ORDERED IN CARBON FIBER OR ALUMINUM. I HAVE THE CARBON FIBER AND IT IS VERY NICE WITH A THICK PROTECTIVE CLEAR COATING. THE SYSTEM CAN BE ORDERED IN TWO VERSIONS, A STANDARD MOUNT WHICH RETAINS THE PASSENGER FOOT PEGS OR A HIGH MOUNT WHICH ELIMINATES THE PASSENGER FOOTPEGS.

THIS SYSTEM WORKS GREAT AND PROVIDES A GAIN OF 10 HP WITH ABSOLUTLY NO JETTING CHANGES. PROPER JETTING SHOULD RESULT IN A NET GAIN OF 13 HP.

M4 CAN BE CONTACTED AT:

M4 PRODUCTS
2520 MERRELL ROAD
DALLAS, TEXAS 75229
PHONE: (972)481-9300
FAX: (972)488-2772

THE R1'S IN MY TOWN KNOW WHO MAKES THE BEST EXHAUST SYSTEM!