The 2011 Kawasaki KX 450F is here, and Yoshimura R&D would like to announce the availability of their race-proven RS-4 series of exhausts for this brand new machine.
The KX 450F is a capable motocrosser on its own, but the addition of an RS-4 exhaust system really allows the machine to breathe and make some serious power.
You'll notice an immediate boost in horsepower and torque right off of idle, and the improvement in mid-range and top-end power will blow you away!
The RS-4 Slip-on is the simplest way to take advantage of the benefits a Yoshimura exhaust can give your KX 450F. Each RS-4 Slip-on is constructed from stainless steel and aluminum-alloy for lightness and strength, and features a stylish carbon fiber end-cap for even more weight savings. The RS-4 Slip-on also includes a USFS approved spark arrestor. Installation is quick and easy thanks to the included hardware and easy to follow instructions that come with each pipe.
RS-4 Stainless/Aluminum Slip-on
The RS-4 Full-System takes the already awesome RS-4 Slip-on, and mates it to a high-flow Yoshimura header and mid-pipe for even more power. RS-4 full systems are available in standard stainless/aluminum, full titanium or titanium/carbon finishes. The stainless/aluminum system features a stainless steel header and mid-pipe, while the full titanium and titanium/carbon include lightweight titanium pipes.
These titanium pipes will help shave a few extra pounds off of your bike, giving you another competitive edge over anyone who is still using stock steel pipes. Each RS-4 system includes installation instructions and mounting hardware for an easy upgrade. The stainless system has a USFS approved spark arrestor while the titanium systems come with an AMA PRO legal sound insert.
RS-4 Stainless/Aluminum Full System
RS-4 Titanium/Titanium Full System
RS-4 Titanium/Carbon Full System