FEATURES AND BENEFITS 68mm standard bore (393cc) with 68.5 and 69. over-bores available. Mono-cylinder design allows more efficient side transfer ports. Huge Y7250 reed cage for unparalleled throttle response. Seven transfer ports feed the additional intake area to broaden the power band. Single exhaust port wiht 2 auxilary sub ports equals more total horsepower. Variable exhaust valve allows substantial low-end power with huge top end performance. Billet cylinder head provides massive cooling and dome size interchangeability. This allows for easy tuning. Forged ultra lightweight pistons and wrist pins allow quicker acceleration. Hard anodized aluminum exhaust flanges are resistant to wear and cracking. Billet flanges feature O-ring sealing and unlike stock are removable or replaceable. 4130 chrome-moly studs eliminate the stretching found in stock studs. Note: Dasa Banshee T-Rex Cylinders require the use of Keihin 35mm PWK carbs with EEK needles in the 2nd position, 142 main jets, and 42 pilot jets. Aftermarket air filters will be required with the use of these carburetors. Stock air box cannot be utilized with 35mm carbs.