ATI Damper

[c.moo]

Which damper to use on 440 , internal balance , for street ? ATI 917122E or ATI 917120E . Thanks

 

[gkent]

Depends if the motor is internally balanced or not. Likely "internal" but that's not a definite.

 

[Hemirunner]

Which damper to use on 440 , internal balance , for street ? ATI 917122E or ATI 917120E . Thanks

The 917122E and you’ll need to hone out the inner hub for the correct press fit.

 

[65Fury440]

This is the part you need for stock pulley spacing,
however, just sent 2 back, the shells would not stay together straight.
ATI Performance Products ATI917470E ATI Super Damper Standard Harmonic Balancers | Summit Racing

 

[6PKRTSE]

If you are ordering new, make sure to get a BBC bolt pattern on the hub, much easier for buying all the FEAD drive mandrels components. Mine was still a BBM bolt pattern and I wound up making most everything custom for my front dress.