Spoon Sports Rigid Collar - Subaru Impreza Sports, HV GP3, GP7, GPE - Front Steering the material used is SUS316

the material used is SUS316

Temporary mounting hole utilizes an existing threaded location in the framerail (most Honda/Acura applications) and pre-cut X-patterned cutouts facilitate ease of mounting and welding during installation

Nissan's effort

OEM gaskets are thin stamped steel pieces that allow a great seal but won't help reduce that thermal transfer through aluminum engine parts

Twin layer foam filter

Spoon Sports Rigid Collar - Subaru Impreza Sports, HV GP3, GP7, GPE - Front Steering the material used is SUS316Developed by Spoon Sports, the Japanese Honda tuning specialists, Rigid Collars are precision machined aluminium rings that lock your subframe to the chassis. Factories drill the subframe bolt holes oversized so components drop in fast on the production line, and that clearance stays for the life of the car. It leaves the subframe sitting a fraction off centre, dulling steering response and letting vibration through the floor. Fit a set and the bolts