LD340 and NHRA

NHRA legal Performer RPM aluminum cylinder heads for Stock and Super Stock racing classes. These heads are similar to Edelbrock RPM cylinder heads, however the NHRA Legal heads do not have any machining or hand grinding done on the ports & chambers, except for the seat guide bores. Heads feature the NHRA logo on the ends for easy identification. Heads are sold individually. Made In The USA!

Since they are 65 cc ..my guess is they are open chamber heads....wondering if the 11/32 valve stems are legal or do they need to open the guides up to 3/8.....

It is up to the racer and/or engine builder to make sure that the runner volume and combustion chamber CC's are no larger or smaller in volume than what their particular engine corrected horsepower is approved by the NHRA Race Committee. The runner and chamber volume CC's listed below are what they are supplied from Edelbrock, not that they are approved for this volume in your particular class.