Gives snappy low-end response, yet still offers unmatched top-end performance! The DDM Dominator pipe features top-quality steel alloy construction, single-piece design to minimize leakage, ultra-sturdy mounting system, and jaw-dropping high polish show chrome finish. Includes FREE custom X-port finned exhaust spacer for improved exhaust header cooling and to help keep the pipe clear of any frame parts! The pipe passes safely through the rear frame "box" - this design is to allow the pipe to be sufficiently wide to allow for MAXIMUM performance, while still being VERY well protected - pipe is unlikely to be exposed in a rollover. Includes genuine Zenoah exhaust gaskets and mounting hardware. Weight is approx 1.65 pounds. Pipe is covered by lifetime warranty against manufacturing defects from DDM. Fits Zenoah and Chung Yang engines. Fits the stock 23cc "Fuelie" engine on the HPI Baja 5b, and the stock 26cc engine on the Baja 5b SS. Also fits all aftermarket and modified engines.