I have the nismo headers with a stock exhaust right now and with a nismo cai and i am about to get the nismo exhaust as soon as i have the rest of the $514.50 that i need to purchase it, which will be very shortly. does anybody know the gains that i should recieve from these three mods. i looked it up and it said the gains for each individual mod, so do i just add the gains up and that is how much it is. for instance the cai is supposed to get 8.7whp and 10.4wtq, the headers are supposed to get 16whp and 11.6wtq, and finally the exhaust is supposed to get 4whp and 5.5wtq, so if you add this together then that means i have gained a total of 28.7whp and 27.5wtq. is this correct or no? and these are the gains that nismo says they get. thanksBlackoutSpecV said:On a stock spec v you will gain no horse power from a catback. If you have a header, you need the catback to get the most power out of the header. Similar things can be said for: CAI, header, etc..
Exhaust on stock car = no gains
Exhaust on moded car = better gain from the mods