[QUOTE=TheProfessor,Feb 22 2010, 06:31 PM]HI everyone, currently building my s in my garage and need advice on wastegate spring size. Its going to be a tial 44mm, but im stumped because im trying to get 400whp on a pfab log manifold. Ive heard nothing but negatives with this manifold, but it made good friends with my wallet., considering every tubular manifold is like a grand. Id like to know what size spring to get

 

TiAl ftw