Re: Legal Heads for SS/modified
 

The way I read the new Head rules is that any aftermarket head is legal in SS Modified. Doesn't need to be factory part number any more.
some CFE splayed valve in SS/AS or AJ 18 degree in SS/BS??

Re: Legal Heads for SS/modified
 

Could you forward where you read this? Interested, Thanks.

Re: Legal Heads for SS/modified
 

Nope.

The aftermarket cylinder head needs to be approved by NHRA and added to the list of NHRA accepted products. No billet heads allowed although there are rumors of some billet heads in use that have been made to look like a casting.

It took me close to a year to get an Edelbrock cylinder head approved.

Re: Legal Heads for SS/modified
 

Be careful down there in the Modified and Modified Stock classes of SS. Read and stick to current rules.

SuperStock Modified
"V-8 splayed valve permitted in AM and BM, canted or inline in
CM through FM, and any valve configuration in GM with V-6
engine. All heads must be NHRA-accepted, two valves per
cylinder. Aftermarket aluminum cylinder heads permitted (no
billet)."
Where it matters: SS/CM Aluminum canted heads allowed with NHRA stamp.

SuperStock Modified Stock
"V-8 splayed valve permitted in AS, canted or inline in BS, inline
only in CS, and any valve configuration in DS. All heads must be
NHRA-accepted, two valves per cylinder, except in classes DS,
ES, FS, and GS, four valves per cylinder permitted. Aftermarket
aluminum cylinder heads permitted (no billet) except in CS."
Where it matters: SS/CS Inline iron heads only.

Watch your Modifieds.....

Re: Legal Heads for SS/modified
 

In the recent past, cylinder heads used in NHRA Super Stock Modified class had to have an OE casting number. However current rules state that aftermarket aluminum heads may be used in this class. But it also states that the heads must be on the "NHRA approved head" list. Make sure that the heads you chose to use are in this NHRA "list" and keep a hard copy of this list in your files. Yes, it is true, NHRA has been known to change their minds on this sort of things in the past. If your heads happen to get dropped from the list in the future, you should be "grandfathered in" with the list of the approved heads in your possession.

Re: Legal Heads for SS/modified
 

Here is current list of the legal aftermarket heads allowed in the SS/Mod classes.

So whats on here or having a genuine factory part number is whats legal.

Good luck, have fun!

Re: Legal Heads for SS/modified
 

Sorry for any confusion, I missed the Approved, lingo!!
WoW, that 14500000C Dart head is a 9 deg head..
AJ 18 head won't hang with that

Re: Legal Heads for SS/modified
 

Ford boys use the N351 Sportsman head with a 10 degree valve angle. It's not on the list because it's a Ford part number M-6049. n351. It's on the SS/CS record holder.

Re: Legal Heads for SS/modified
 

That Ford head is iron and nobody would use that in any other class than SS/CS.

Re: Legal Heads for SS/modified
 

iron and heavy as hell