will a megamax exhaust with quiet core or a top end rebuild kit be the best power for the money. you have to remember installtion price for engine rebuild and rejetting price for the exhaust. the rebuild is about $120 and the exhaust is about $250 plus installtion.

 

What bike? You have a picture of the 250R there, but isn't the MegaMax a 4-stroke pipe???

 

300ex with rev kit, jet kit, kn filter

 

a cam an piston would do you wonders. it would do more than a pipe would, but when you add a pipe the gains would only increase. also, don't get a megamax. these are basically no better than stock. if your wanting power, the sparks pipes seem to work good on the 300ex's. the 300ex's need a larger headpipe.