With a custom tune you would be able to run a 3.2" pulley (12psi pulley), given your proposed mods. Otherwise with a standard tune or one of our memcal tunes, the most you can safely run would be 3.4" pulley (10psi pulley)
I'm looking to upgrade the boost on my l67 vy calais. I'm planning on buyin a cai and I'm wondering what's the possibilities for boost pressures if I was to run a cai and a tune. Is it possible to run more than a 3.4" pulley with a tune?"
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