This is my other R/C car, its a HPI RS4 V3. Features a .15FE Nitro Star engine. It produces a little under 1hp.

After some reading about the Nitro Star engine i read that the stock header is a very restrictive part, so i upgraded to the HPI aluminum header pipe. The opening was smaller than the opening on the actual engine to increase backpressure, so i ported the hole slightly larger to provide better exhaust flow with a dremel and a grinding head..
