LD4b 340 Edelbrock Intake

On the LD4B, the runners are closer to a stock type of config. as the LD340 is farther away from it with the runners turning right after carb mounting pad. The LD4B's runners just aren't quit as smooth as the LD 340's, but are a big step up over stock!!!!!!!!

Both of these intakes will show excellent gains on there best fitted/respected engine sizes.

I think the newer Performer out performs the LD4B. Though Adam has a good point on porting out the runners to work, and work it will.