TiAL® Sport Inc. USA takes pride in establishing its company reputation by designing the highest quality engineered products for today's performance turbo charging systems market.

Details of this specific product are as follows:

TiAL Blow Off Valve Springs.

"Version 1" Tial 50mm BOV:

-22 to -23 in/Hg use Yellow - 12 PSI spring.
-18 to -21 in/Hg use Plain -11 PSI spring.
-14 to -17 in/Hg use White -9 PSI spring.
-10 to -13 in/Hg use Black -7 PSI spring.
0 to -7 in/HG (or supercharger) use Green -3 PSI Spring.

"Version 2" Tial Q/QR BOV:

-20 to -21 in/Hg use Yellow -11 PSI spring.
-16 to -19 in/Hg use Plain -10 PSI spring.
-12 to -15 in/Hg use White -8 PSI spring.
-8 to -11 in/Hg use Black -6 PSI spring.
0 to -7 in/HG (or supercharger) use Green 2 PSI Spring.

Black = 6 Psi
Blue = 8 Psi
Red = 10 Psi
Purple = 11 Psi
Silver (plain) = 12 Psi
Green (supercharged) 2 Psi

Universal product for all Evo models. Please select from the options on the right.

Stock images used. Actual product may vary.