HPI RS4 Exhaust System

[IdriveSlideways]

I

I ran one tank and not a single drop. But I noticed there was some white smoke coming off the top of the exhaust. Is that anything to be worried about?

wouldn't be too concerned about it. Just keep a close eye on it. If your exhaust is leaking, you should notice a decrease in power or the engine just running poorly.

 

[ninnon]

If the exhaust works then there's no real reason to change it, to find a replacement exhaust that fits would be difficult.

 

[Certified Mike]

If anything, once you know it's sealed up and you don't have any kind of serious damage to the exhaust, you can look into a little port and polish to help out with the flow and maybe get a point or 2 Of hp out of it. Just be SUPER careful with the dremel to be sure you don't weaken anything. As mentioned, I would guess that exhaust to be difficult to replace... Or maybe you can just do a funky mix and match with a header and pipe... But I don't have enough experience with that to help you thru it. I have read up on it and it seems that building header and pipe systems to add torque and/or rpms can get very technical. Might be a fun project but not something I see myself doing until I am a LOT more familiar with with the science.
If you have it all sealed up and it's burning crap off the top of the pipe, I'd say you've got your leak issue solved... So congrats!