Trask Nasty Bastard 2-Into-1 Exhaust For Harley Touring Some pipes are aggressive, or mean, but the Nasty Bastard 2 Into 1 Exhaust from Trask is straight up Nasty! This pipe is capable of adding 12-15hp on a stock motor and looks as mean as it sounds. Features: Heat shields come pre-installed 1215 HP increase on stock bikes 37 length with a 3 1/2 diameter mouth 18mm O2 sensor bungs (narrowband adapters included) Performance baffle Billet exhaust tip Made in the USA