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

NISSAN 300ZX 3.0L DOHC V6 (VG30D-TT) 1990-96
28.6MM 21.3MM 70 LBS. @ 34MM 190 LBS. @ 10MM Lift 14MM 19MM Dual Spring
X-Treme Alloy		 UR8114S
20.3MM 15.9MM

Note: please use SI retainer TR-9017 and SI IL-1011 stock base with 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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