Can you use a usra concept motor in ump

Joe rinne

New Member
New here and looking to get into b mod racing. Found a few cars and some have a USRA concept motor would I be able to run I-55 with that?
 

Joe rinne

New Member
Will they make me run with the a mods or can I run with b mods and just not get any purses or points till I get a different engine
 








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