Here's a cost effective solution for your ebay kit, stock cylinder, or malossi cast bore. This is for the guys with the mild, sport setups. Good low and midrange, but NOT made for high end bores such as corsa/malossi MHR. Choose from the silver version, more specific to 72cc, or the black one, also for 72cc, but really works best on mild setups. Also great for stock replacement, and an awesome choice for the guys that cant have a noisey pipe. Remember, these are made in taiwan, they aren't italian high end pipes.