NISSAN 2.6L SKYLINE TWIN TURBOS JAPAN ONLY RB26DETT '89-99. NISSAN 2.5L SKYLINE TURBO JAPAN ONLY RB25DET '89-99. WEIGHT TOLERANCE IN EACH SET NOT OVER 2 GRAMS FOR MAXIMUM ROTATING BALANCE. SEMI ROUND PROFILE AT BIG END WILL REDUCE REDUNDANT WEIGHT BUT NOT DECREASE STRENGTH.
