Who does it? I have a spare throttle body and if the price is right I might just get it bored out...
Is it worth it? At what point does it become a restriction???
TIA
Manny

 

I've heard that the stock TB will flow enough to make 550 hp. Your intake manifold is the restriction to big HP right now. Keep a stock TB and make a new intake. There is a ton of info on the forum about the intake etc.

 

it's always going to be a restriction, it's just a question of degree.

 

I forgot about the air meter box, thats your biggest restriction right now.

 

a few ppl in AUS have proven the stock S5 and Fd manafold are goo to over 700hp

 

Mine resized. Copper is original size.Secondary size moved to primary.Removed as much restriction through out . It may all be for nothing.We'll see.