Re: Header Retention Rule Revision
 

Stephen, you are right.

Also, too many people have their shorts wadded up!
The rule change, although late, it just gives an option.
There are cars you can use an exhaust clamp to the chassis or frame.
However, there are some cars that will be difficult to do, therefore, they will need tethers.

There will also be racers that although they can put a clamp, due to esthetics, they will use tethers.

Much of the complaints and anger could have been reduced if NHRA would have allowed racers build their own. All it would have been required was to write the specifications for the hardware and a drawing in the rule book the same way as they do for the roll bar/roll cage. What made matters worse was when the initial approved offering cost was outrageous when many are aware of the cost of the components.

Re: Header Retention Rule Revision
 

Couldn't have said it any better myself !

Re: Header Retention Rule Revision
 

As per NHRA site today.
Clarification of General Regulations, 1:3 Exhaust Rule Amendment


Following the amendment to the Exhaust rule in General Regulations, the National Hot Rod Association’s Technical Department would like to clear up some confusion regarding the requirement of the NHRA-accepted header tethers. If you have a vehicle that has removable multi-piece exhaust collectors/stacks, you must secure them using one of the following methods:



· Secure the collectors/stacks with an NHRA-accepted header tether.



· Secure the collectors/stacks with a minimum ½” (half-inch) stitch weld located on each primary tube.



· Secure the collectors/stacks by permanently attaching them to the vehicle body or frame with positive fasteners such that they require tools for removal.

Please keep in mind that the attachment methods listed above are meant to be a secondary method of attachment. All factory attachments, such as springs and/or bolts, must remain in place.



Also, we have had several questions concerning the lack of manufacturer’s markings on the band clamps of NHRA-accepted header tethers. For the initial manufacturers this was not a requirement; however, all header tether manufacturers are now required to have all components marked with the manufacturer’s name and/or logo. The initial header tethers that are missing markings will still be accepted by the NHRA.



We hope that this clarification will clear up any questions about the rule amendment; however, should you have any additional questions, please feel free to contact the Technical Department

Re: Header Retention Rule Revision
 

Maybe I'm reading into this too much, but what is a "multi-piece" exhaust collector?

I have removable collectors, but they are one piece. I don't think I've ever seen "multi-piece" collectors. Tri-Y's maybe?

Can't they just be clear in their "clarification." WTF.....

Re: Header Retention Rule Revision
 

It's a safety issue do what ever it's takes because some racers are ????????? Just saying

Re: Header Retention Rule Revision
 

A removeable collector with a removable extension.
Chuck

Re: Header Retention Rule Revision
 

OK, I've had the same question in my mind on the wording (multi piece collector) I've got a 1 piece collector...no extensions, so where does that leave me? As I've posted before..the wording is extremely vague. Maybe an explanation of what EXACTLY a multi piece collector actually is? Or maybe I'm merely too dense to grasp their meaning...? This can't be as hard as the NHRA is making it, again clear precise (maybe even a drawing or 2) of what EXACTLY they're meaning is. Basically they're losing me with the MULTI-PIECE word, anyone?

Re: Header Retention Rule Revision
 

Taking it further, If you collector is not welded to the header, that would mean it would require some sort of attachment pieces, nuts-bolts, etc. making a multi piece collector
Chuck

Re: Header Retention Rule Revision
 

It's pretty clear to me:
There must be 2 methods of attachment:
1.) What we are using now: tabs w/bolts; bolts; springs.
2.) Approved tethers or welding or mechanically fastening to the vehicle with a method requiring tools (clamp, hanger, bolt, no quick release fasteners)

Re: Header Retention Rule Revision
 

If I had the time and money, it'd be a great time to do a full exhaust system on the car. Myron Piatek's car sounds like a street rod! Pretty sweet. Spent a little too much time laying underneath mine, though.