by the end of this month, i wil have a catback, magnaflow cat, ZZP downpipe, ZZP headers, and a K&N intake. if i get a tune, will i get good HP gains?

 

yes, I have a similar setup on an 07 and notice a huge difference. I noticed a difference between tune and no tune with 2 kayaks on my roof with 40MPH cross/headwinds at 60 with just a K&N filter, muffler, synthetic lube, granted on the 07 I also have the lsj/le5 exhaust manifold stock. I can't wait until I can put my summer tires on and strap the kayaks on again for another run.