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Old 01-01-2015 | 12:50 PM
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houston
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Originally Posted by travertini
Hey Monty what was the difference between the 421b and 821b ? And do u know the part # for the 821b piston and sleeve ? Thanks and happy new year bro
Dude ,there was literally like 6 different versions of the 8 port piston and sleeve configuration as far as porting design ,nutz

08038

I have a few if you need one


821b just a "newer" version of 421b really

There were many dfrnt configurations of 421 421bx 421 blah blah but they for the most part were nothing super special in comparison to what is offered on the market today
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