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Author Topic:   180 degree headers
Dirt Newbie

Total posts: 4
posted July 03, 2004 10:36 PM  
I'm back in racing after a 15 year layoff, after reading the rules for a imca modified are 180 degree headers allowed?


Dirt Forum Champ
Total posts: 5390
posted July 04, 2004 08:38 AM  
180's were allowed in the 2003 rules, make sure your not reading the stock car page of the rule book

Dirt Newbie

Total posts: 4
posted July 04, 2004 01:45 PM  
The 2004 rules state "Round tube headers only. All primary header tubes must enter directly into one collector at same point at end of header."

The way I decipher that is 180 degree headers are legal, but I wanted to check with some experts since I've been out of racing for awhile.

Dirt Forum Racer

Total posts: 92
posted July 05, 2004 07:09 AM  
I have run 180* headers at the Supernationals for the past 5 years and never had a complant in tech inspection.

Dirt Freak

Total posts: 324
posted July 05, 2004 07:15 AM  

unregistered Total posts: 324
posted July 05, 2004 03:42 PM           send a private message to dirtywrench13   Edit/Delete Message   Reply w/QuoteBBBBBB
For those of us on the "Engines for Dummies" program, just what are 180 headers?

Dirt Newbie

Total posts: 4
posted July 05, 2004 09:16 PM  
Originally posted by mod70:
For those of us on the "Engines for Dummies" program, just what are 180 headers?

180 degree headers exit over the top of the engine at the rear to the passenger side of the vehicle, they also take 2 tubes from each side into the collectors, they have a different sound [I think it sounds cool] the reason I'm interested if they are legal is because I already own a set.

Dirt Freak

Total posts: 303
posted July 06, 2004 12:41 AM  
werent the 180 degree headers built for a 180degree firing engine? something about firing 2 cylinders at one time?

Dirt Maniac

Total posts: 180
posted July 06, 2004 08:18 AM  
180 headers work on a standard fire 350 chevy motor. And he's right, they definitely have a unique sound! The street stock classes in our area use the 180's and they really "scream".

Dirt Maniac

Total posts: 192
posted July 06, 2004 02:58 PM  
The only " bad" part of the 180 degree header noise is everyone thinks you have about 30 points more gear in the car. The nice thing is those headers tucked up out of the way rarely get hurt by contact

Ego Racing
Dirt Forum Champ
Total posts: 724
posted July 06, 2004 08:31 PM  
The drivers foot box stays alot cooler also.

Dirt Freak

Total posts: 270
posted July 07, 2004 04:17 PM  
180 degree headers are legal.We have run them for years.They produce great low end torque and they don't hang outside the car.
On the 180's the tubes enter the collectors so they follow the firing order. This causes a scavenging effect.One cylinder draws out the next in the firing order.That is why they sound so different. Schoenfeld sells a couple of different numbers just under$200.00 a set. Cheap torque and HP for the money. It is also easier to get to the spark plugs. They won't fit on some cars because the bay or motor plate bars are too close together.

Good Luck!

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