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Sizing a 38r exhaust housing

970 views 7 replies 3 participants last post by  bruce51d 
#1 ·
I'm looking at some basic mods. Already ordered the PHP Phoenix setup. Down the road (this summer) I'm looking at installing a 38r and 160/30 injectors. What size exhaust housing should I be looking at? Truck is used for towing and normal driving.
 
#5 ·
How much is the sd66?
 
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