Mitsubishi 4G63 DOHC EVO 1-9. High Performance PACALOY Beehive spring and Titanium retainer set. Suits high RPM, high boost competition engines.
4G63 DOHC Extreme Force Beehive Springs
Ultimate Valve Spring and Retainer Kit for Drag Racing 4G63 engine
Designed for 1650+HP applications / 11,000+RPM
Not for the faint hearted, ready to break records.
Key features:
- 142lb on the Seat, 292lb open
- Pac Racing High Frequency Beehive
- Huge 14mm to coil bind
- 4340 Black Nitrided Retainer for extra durability
- 4140 CNC machined seat
Intake installs at 39.5mm 132 lbs. seated, 278lbs at 12mm lift.
Exhaust installs at 38.5mm 142 lbs. seated, 292 lbs. at 12mm lift.
Maximum lift 14.0mm, Coil Band: 24.50mm
4G63 DOHC Premium Valve Springs
Mitsubishi 4G63 DOHC EVO 1-9
Install at 90lb seat pressure. Maximum valve lift 13.50mm.
High Performance PACALOY™ Beehive Valve Spring and Titanium retainer set. Suits high RPM, high boost competition engines. Install at 90lb seat pressure. Maximum valve lift 13.50mm.