GSC 4G63 Oversized Valve Spring Seats (4041) Driveshaft Shop The Akrapovič Sound Kit is

The Akrapovič Sound Kit is compatible with the Akrapovič Slip-On Titanium Exhaust for the 2020 Supra to control the valves in your exhaust adjusting the sound via the Akrapovič Sound Remote Controller or the smartphone app for iOS and Android

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The figure on the left shows how the GrimmSpeed intake design compares to other intake designs with respect to MAF placement and how that affects airflow readings

External reservoirs on SA type dampers allow for added oil capacity

STM-EVO89-STD-FPRK-53501-5

GSC 4G63 Oversized Valve Spring Seats (4041) Driveshaft Shop The Akrapovič Sound Kit isGSC Power Division CNC turned chromoly valve spring seats for the 4G63 Evo and 1G 2G DSM. These are meant for those pushing to the absolute limits! With an additional 0. 035" built in, the need for shims and potential wrong stacking of shims is eliminated when higher spring seat pressure is required. Sold as a set of 16. Vehicle Fitment: Mitsubishi 4G63 1992 2006 Evolution I IX 1990 1999 Eclipse GST GSX 1990 1998 Talon TSi 1990 1994 Laser RS 1991 1992