I have an S4 with 140k. The engine has been rebuilt about 20k ago. Is it a bad idea to streetport it?

 

Well.. it will cost you a whole rebuild for a few horsies. Its all in you, id say if its your daily and you have school or work regularly, the down time and stress to try to hurry isnt worth it, but hell go for it. more HP is allllwwaayyysss a good thing.