Edelbrock Performer RPM

replicaracer43 said
Both are great intakes, but it will be a waste of intake gaskets to change it, you will never know the difference on the street.

DFX 340 Duster said
I have a friend who runs a 340 Demon in the Sportsman classes (Stock and Super Stock). He advised me not to spend money on buying the Performer RPM since I already had the LD340. He told me to smoothen the plenum and runners and since my plenum divider had the small notch already cut into it that was all I needed to do short of gasket matching the ports.

Spot on advice.

I would not mess with the divider if it's still in place. It's a decent mod for an engine that will run at high RPM all the time, will cost down low on the street.

I run LD340's with a 1" open spacer on them. Hard combo to beat for a hotter street car.