hi guys i am getting a used sirio evo 4 engine! it is already broken into, the thing now is i want to clean it out to make it look brandnew , is it a bad idea or is it okok to do so?! also one more thing i want to shine up my pipes and header again is there anything to do that or do i just scrub away at it?! leave it alone?! ThankYou!

try this link

http://www.cefx.net/tips/nitro/maintenance/

Thank you!