The development of our powerful OP engines could only go hand in hand with an exhaust system that enhances the features of our propellers. After accurate tests made by our pilots on propellers of different brands, including OT, we developed our exhaust kit OT-OP7897, a muffler that enhances the power curve of modern propellers at any engine rpm while optimising the consumption. Thanks to the eye-catching “Polished Look” and to the very convenient price, the new kit is a must in the toolbox of every racer.