i have a 5.5 psi spring w/ my tial..im planning on getting a greddy profec B next week...do I need to get a higher rate spring? plan on boosting 10-12 lbs track and 6 for the street. thanks

 

id like to knoe that question too. I got tial with a .45 bar spring.

hey did yours come with a 5.5 psi spring? Mine came with a 6.5 psi spring. How do I swap those things out or where would i get the springs? Its probobly useless when i get my profec b

 

You need a 6 lbs spring to run 6 on the street. The boost controller will take care of the 10-12 track seting.