Pro Series Springs are precision wound from only the purest, Hi-Quality chrome-silicone materials for the demands of today's high revving, X-treme boosted sport comact engines. Pro Series Springs go through many stages of Quality Control to ensure a great piece every time. OUR RACERS RELY ON THEM SO CAN YOU.......

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SPORT COMPACT VALVE SPRINGS
O.D. I.D. SEAT PRESSURE OPEN PRESSURE MAX
LIFT		 COIL
BIND		 TYPE PART NUMBER

SUBARU WRX 2.0L DOHC TURBO (EJ-20) 2000-03
SUBARU IMPREZA 2.5L DOHC (EJ-25) 1998-03
29.2MM 21.3MM 75 LBS. @ 35MM 185 LBS. @ 10MM Lift 14MM 19MM Dual Spring
X-Treme Alloy		 UR8120S
21MM 15.5MM

Note: please use SI retainer TR-9019 and SI IL-1013 in place of stock spring base
 

also manufactures custom valve spring retainers from chrome-moly and titanium for various high performance applications. Please contact a salesperson for your bulk retainer needs.
 

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