Just google, "Fully bolted and tuned 9th gen si". From what I've read you can expect 25whp.. more or less

 

Nope. Still will have just about 200whp.

 

x2. You're not going to see huge gains

 

Not much gains but the car does feel like it does 200whp is not bad for a NA engine, you will see a loss of mpgs due to more WOT more often i would just go with the CAI+FP&tune+DP+stock catback unless you are ok with drone and loud downshifting and acceleration

 

all motors are different... i have a cold air buddy club dp and custome loud A** EXHAUST lol and made 226 hp tuner told me most of the other ones with simalr setups make 206ish

 

Did the 2015s switch from a downpipe back to a header?

 

You didn't hear?

 

No the header is built into the head.. the 2015 can only have the do changed

 

Dp*

 

You do know he was joking right?

 

the buddy club header is pretty impressive. im running that myself... i havent put my car on the dyno yet but ive been keeping tracks of my gains at the race track. i ran a 15.2@93 stock, best run. downpipe, motor mount, and vit tune i ran a 14.4@97. that is a pretty significant gain IMO for just a downpipe and motor mounts. i need to finish the last few cals of my retune with vit and see what i can do with a skunk2 CAI now and ill be purchasing some rpf1's here pretty soon and im expecting to be touching the high 13's after all that.

as far as gains, each car is different but with your basic I/H/E setup you can expect to be in the 200-210 (realistically) range but as mentioned i have seen some push as high as 220ish but dont just go off these numbers because they really arent that accurate and theres a lot of variables that could skew the results of a dyno run.