aiight if you're going to go with the Racer, you're gonna be spending slightly more money in the short term and less money in the long term. with the kit or RTR, it would be the opposite. but since you've decided on the Racer, here's what I would recommend:
you should take a good look at the O.S. engines, the .15 ones in particular, b/c the extra torque over the .12s really helps when off-roading. now i'm assuming you want a pull-starter with your engine so look at the .15 CV-RX
, i've heard nothing but good stuff about them. one of these should set you back $150-180 USD (sorry, i can't really say in your currency). there are more crazy engines like Picco, Novarossi, RB Concepts etc, but those are noticeably more expensive. you're also gonna want a better flywheel than the one that comes with the kit (it's not bad, but it would be good to get another one) like this one
. a good (and slightly cheaper)alternative to this engine would be HPI's .15SS
, which is not as powerful, but is still a pretty good buy.
if you want to stay with the stock header and pipe for now, then okay. it is, however recommended that you get upgraded ones. this
is a good, and very commonly used header, and you should consider the CVEC
pipe although you wouldn't be allowed to race in sponsored races cause they dont allow any pipes with moving parts. they do sound GREAT and definitely give you more power than the stock pipe.
you're also gonna want an in-line fuel filter
, just in case some stuff gets into the fuel tank, so it doesnt get to the engine.
Hope this helps some, and if you have any more questions, email me, IM me, PM me, or just post here