250ex exhaust

[250exguy]

which exhaust should i choose graydon full system
procircuit full system, white bros slip on, yoshimura full system or a duncan fatboy 4 full system

[White_Knuckles]

The Procircuit slip-on is my choice because you can still find a T-4 (old style end cap) for around $214 shipped. The added expense for "full" including headpipe makes little difference and will be missing the heat shield. The stock headpipe is stainless steel and is about 1 mm smaller then the aftermarket pipe. This makes for better low-end leaving on the stock. The "full" is for top-end and might yield a 1/2 mile an hour faster top speed before the rev limiter greets you.

Four strokes can use better flow throughout: exhaust, airbox / filter and a couple sizes larger main jet. Pipe shootout dyno readings show minor improvment from brand to brand, slipons against full systems. For around $300 you can add a slip-on, UNI filter some airbox vents (or pull the lid) and a few main jets to experiment with. The guy who spent $500 for a Yoshi full, K&N filter and Dynojet kit will be running side by side with you...but poorer.