A company has some aftermarket equpiment such as the larger throttlebody and mass air...and trys to sell the purchase with 25-30 rearwheel hp gain....is this possible?

 

It might help get some HP but not without putting some big exhaust on the other end to let it flow....

 

I doubt the bigger mass air is bigger than what you have now, unless it is 100mm or something. Unless you are heavily modded (Kenne Bell blower, etc.) it is a waste of money. Even a throttle body is not really worth it. The money is better spent elsewhere like cold air intake, pullies, custom chip or tuner.

 

i have all that....bassanii exhaust,upgrade my pullies (upper and lower), intake, chipped...still not worth it?

 

Then they may help but I doubt you will gain 25-30hp by upgrading the MAF unit and throttle body. I've know a few to dyno before/after with the throttle body and they gained around 5 hp if any. I personally bought a throttle body when I just had a chip, filter and 4# pulley. Whether it helped or not I don't know.

I would get some traction bars like the Rancho style if I were you. JDM, Johnny Lightning, Lightning Force Performance, and Outrageous Performance sells them with little variations.

Lightning Force Performace will probably be the cheapest.

 

Even the heavily modded trucks only get about 5hp from the throttle body swaps.

 

Not worth it unless you got an aftermarke blower ( kenne bell, whipple....) Your gettting all the air you can pull with your mods.

 

so how much you think it will add to a vortech blower

 

have a stock 03 harley and looking to do some upgrades can anyone tell me where my money would be best spent? or should i just get those traction bars?

 

your fastest and most noticeable mods for immediate HP and performance is your exhaust, bassanii is the best for our trucks...and then your air in-take. you'll notice about 20-30hp out of them together (12-15 a piece). than after that go for the tuner and then upper and lower pullies....

 

i have a lightning basically the same and cold air and mass air with a super chip made awesome changes to my truk promiss you will be happy C @ L performance out of hunsville alabama .. thats where to get the good stuff