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By inserting these collars in specific subframe locations you can ensure less flex and more accurate suspension feel
By selecting these specific locations
Improves the Feel of the Shifter
necessary hardware and a circuit-spec air-duct
We recommend it for cars up to 50-70% more power(depending on part number)
GSC Traditional Exhaust Valve Guide Set - Subaru EJ20 / EJ25 Epic Engineering By inserting these collars inGSC Power Division makes traditional exhaust valve guides that fit properly, easier to install and shaped to help air flow instead of just copying the OEM design. GSC's Subaru EJ20 EJ25 exhaust valve guides are made from true C67410 Manganese Bronze and turned on a dedicated precision CNC turning center creating some of the tightest tolerances in the industry with the best quality control possible. *Note these guides do not feature a depth stop and
