If these silicone hoses are of the same caliber as others (EVO brand) which I'm sure they are, then they will handle 50 psi
EVO ProClimb/Cross 1100T Silicone Boost Hoses with T Bolt Clamps
Product Description
Product Details
The EVOPS Reinforced Silicone Charge tubes are a great addition to a stock 1100T and a must for higher than stock boost levels or turbo upgrades. Our hoses are twice as thick as the factory hoses and have been tested to over 50 PSI. The included T Bolt Clamps have the clamping power to keep the hoses on - even under extreme boost. Because there are only two hoses and four clamps, we minimize the margin for error and number of failure points. Aluminum charge tubes typically have many more connection points to fail, plus will absorb under hood heat causing higher intake temperatures. All of this plus they look great too!
Will not absorb under hood heat like aluminum
Have been tested to over 50 PSI
Will not pop off like the factory hoses and clamps
A must for high boost applications
Look cool too