Skunk2 Racing 310-05-1400 Alpha Series Valve Set Fits 93-01 PreludeEngine Valve Set Alpha Series Valve Set Alpha Series Valve Set; Stock Size; Std Compression; Dish Face Intake 35mmx106. 85mmx5. 48mm Exhaust 30mm x 106. 45mm x 5. 45mm; Head Dia. Intake Exhaust 35. 00mm 30. 000mm; Set of 16; SPECIFICATIONS: WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: This product can expose you to chemicals including lead; which is known to the State of California to cause cancer. For more information;