Also, improve the safety features including the brakes and seat belts. Some even include a roll cage for defense in the event of a mishap. The RB25DE cylinder head in the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) is usually used. The RB25DET (from your R33 Skyline https://rb26-motor66283.life3dblog.com/30386987/a-secret-weapon-for-nissan-rb26-engine-for-sale