Yoshimura has been developing high-quality exhaust systems since 1954. Their newest iteration, the RS4 has been specifically designed for the 2010 CRF250 which can be found in a number of configurations to suit any budget. All models feature Yoshimura's duplex chamber system to dampen sound and shed weight.

Here's the run-down for pricing on all of the models:

2010 CRF250 RS4

Stainless Aluminum Slip-on
P/N 2283704
MSRP $395.00

Stainless Aluminum Full System
P/N 2283504
MSRP $595.00

Titanium Titanium Full System
P/N 2283167
MSRP $845.00

Titanium Carbon Fiber Full System
P/N 2283162
MSRP $895.00