Massive Speed System

MAHW'14220

Massive High Strength Extra Length Reusable Crank Pulley Damper Bolt GM LS V8 LSX LS1 2 3 4 5 6

Crankshaft Pulleys

High Strength - 197,000 PSI Tensile Strength! Dont risk your high performance build!
XL Series is 10mm LONGER - engages more thread deeper in crank snout bringing damaged cranks back to life!
Fully reusable, unlike stock one time use bolt
Separate Bolt / Washer plate for high accuracy torque transfer
100% Made in the USA - Quality!

XL Series! 10mm extra length provides MORE thread engagement! Still fits ALL LS Motors '97- today except Dry Sump. Perfect for getting proper thread engagement on those DAMAGED crank snout threads!!! Did you (or someone else?) use a stock or other bolt to attempt to draw down the press fit crank pulley? Those who have tried this soon realize the first several threads will be pulled out of the crank... often rendering the crank useless. Massive has released this new XL-LS Extended length bolt that travels further into the threaded crank snout to engage more thread, giving your damaged crankshaft new life. The OEM bolt only engages the last 22mm of thread. Our new XL-LS bolt offers 32mm of engagement, a 50% increase. So even if the first few mm of your crank threads are damaged, merely clean out any material, and you will obtain proper or even increased thread bond! Others have used the superior torque transfer on their crank driven supercharged cars for enhanced clamp load. Our bolt is a full 10mm longer than the OE or ARP bolt. Because, who couldn't use an extra 10mm? Works with ALL LSX Engine (except LS7 or other OEM dry sump - see our othre listings for those applications). Grade 12.9 197,000 PSI tensile strength 12 point flanged bolt finished in black oxide is far stronger and places superior clamp only load to balancer through the use of a separate washer plate (a full 1/4" thick!) versus the 1 piece stocker. Fully reusable.

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