just finished putting a Strup axle back exhaust and a TRD intake. Each is suppose to add about 7 hp each. What a differance in performance. Strup exhaust adds nice low rumble at all speeds. TRD intake sound awesome. I will be adding the Strup header next which they say will add another 5-7 hp.

 

Don't bet on really getting those numbers, FYI. You will probably gain about 7 HP TOTAL.

 

as mentioned above, the realistic numbers will be less than what you are expecting. You cannot simply add claimed #'s to expect a final hp increase output.

TO really make those mods efficient you'll have to tune it w/ a piggy back.

With all those mod's I'd say a real life dyno would show approx 8-9 hp gain. Our engines are just not high output enough where the piping would really be considered too restrictive.