this is the os 20e carb that people like to run in the hyper motors. it is an excellent carb and holds a tune great and tunes really easy. i bought this brand new and used it a few times and ended up selling the car it was on and kept this carb and put the original back on. this is not a cheap carb and is hard to come by. all the seals are good on it and has been cleaned of any fuel. asking 30.00 for it shipping included.