Exhaust housing questions..

[Steve V]

Just for clarification. I know there is a Garret .63 housing and .85(ssuming that's percision),is there such a thing as a precision .63 housing. Garrett .63 should spool quickest with Percision .63 next the the .85. Of course the .85 with have more topend pull. Feel free to set me straight on this.:biggrin:

 

[Slow91z]

I'm pretty sure that the Garret and Precision both have a .85.

 

[bison]

Garrett has a true .82 and a true .63. Precisions .63 is roughly .7 and the .85 would be more than .85 but i dont know if anyone calculated it out. Turbonetics also has a .63 and .82 that flow better than the Garrett housings. More flow = higher rpm to spool.