Titanium retainer, strengthened valve spring, higher elevate camshafts and strengthened stem seals upgraded to maintain large-stop functionality Nissan RB30 ring gear, faraway from manufacturing unit flexplate, prepared to healthy to aftermarket high horsepower flexplate, yellaterra or raceglides fits other RB engines. Getting my JDM Engine 4AGE Blacktop engine at NM https://https-www-nwjdmmotors-com45676.imblogs.net/82275450/the-definitive-guide-to-nissan-rb-engine-for-sale