I was reading the rules and it seems for every class but the hot rod and pro classes have to rule a muffler and have to exit after the rear wheels. How do u guys get away with running open downpipe/header? If the open downpipe/header is permitted in et and bracket, is it permitted in sport fwd? Would a downpipe that exits out the side of my front bumper be legal in any class besides pro and hot rod classes?

I was thinking about making my downpipe come out the side of my front bumper but wanted to make sure i can still run my car in the sport fwd class.

 

anybody???

 

You do have to have Exhaust W/ a muffler behind the tires in the sport classes.

 

what about bracket and et classes?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flip1199 &raquo;</TD></TR><TR><TD CLASS="quote">what about bracket and et classes?</TD></TR></TABLE>

The CMI events don't care of you have an exhaust on if you race in the brackets. I would think at NHRA events they wouldn't care either. As stated above, a "street" (heads-up) class would probably require a full exhaust system.

Where did you read this rule? Can you quote it?

 

this is the rule from nhra sport fwd:

Exhaust:
All exhaust must flow through functioning muffler(s); must exit
behind rear tires. Any vehicle that did not come equipped with a
muffler(s) from the factory permitted, provided complete,
unmodified (except for header) OEM exhaust system is utilized.

this is the rule for et bracket:
Exhaust:
All cars competing in E.T. Bracket classes must be equipped with
functioning muffler(s). Any vehicle that did not come equipped with
a muffler(s) from the factory permitted, provided complete,
unmodified (except for header) OEM exhaust system is utilized.

 

so how do u guys run open downpipe/header?

 

you can run open header or down pipe in brackets, not in sport classes. But if saturday has noise restriction you need a muffler on a header. Jason

 

ok thanks