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Burns Stainless Merge Collectors are extremely popular with NHRA racers and
 NASCAR engine builders, and are widely used in NHRA, ALMS, FIA-GT, and Grand Am as well.

Burns Stainless Merge Collectors (Header Collectors) are custom engineered for each application using our proprietary X-design parametric custom exhaust design computer program. Merge Collectors combine high flow and high velocity to increase and broaden an engine's torque curve all the way to the horsepower peak and beyond.

Our products feature the highest quality fabrication and TIG-welding.  Each is completely hand finished inside for proper flow.

For drag racing and similar applications where a tailpipe is not required, megaphones fitted with reverse cones are invariably the best option. They produce maximum horsepower and maintain the highest and smoothest torque curve. Megaphones also offer the highest potential power past the peak without compromising the lower end of the power band on well-developed engine combinations with optimally short-header tube lengths and a well-chosen collector outlet diameter. For applications which require tailpipes, a NASCAR-style transition (long or short) and ring is normally recommended. If you are unsure which style is best for you, please call to discuss your specific application.


 
   header collectors 

Here are some common collector outlet options.
 
To specify collectors for your application, we need to determine 4 basic parameters.
 
 1
Straight extension
1. Inlet type-number of primaries* entering the collector and the outside diameter (OD) of your final header primaries. This is where the collector begins. *Collectors are available in 2, 3, 4, 5, and 6 into 1 configurations.
 
frequently used with 4-2-1 (tri-Y) header primary collectors.
header collectors

2

2. Collector Outlet Diameter- determined by our X-design program. There is no standard outlet size, each collector is based on the engine’s specs.

                            V-band flange typically added to turbo collectors
header collectors
4 into 1
Collector 
 
Short    Tailring
Transition   
 
 
 
3. Style of Outlet- Shown are five of our most common merge collector outlets: Straight extension, V-Band Flange, Short or Long Transition, or Megaphone-Reverse Cone. 
For optimum flow, the collector exit should be larger than the collector outlet size and is the reason for the distinctive “hour glass” appearance of merge collectors.
Transitions are normally used in applications with tailpipes, or where a short collector is required.  If the tailpipe is to be butt-welded to the collector, a tailring is not necessary.
 
4. Final Outlet Diameter- designed to adapt to your existing exhaust. 
A tailpipe ring (tailring) is described by its outside diameter.  It slips inside your tailpipe and is normally 2" long.
If you plan on a megaphone, a reverse cone is highly recommended.
 
2 into 1 
Collector
 
Long           Tailring
Transition
 
4 into 1 Collector
  Megaphone
Reverse Cone

A Megaphone is used, especially with a reverse cone, for maximum peak horsepower and power bandwidth.  A Megaphone with Reverse Cone has the added dimensions of; taper, Max OD, Outlet OD, and Overall Length. 

 
Each of these is available in 2, 3, 4, 5, and 6 into 1 configurations
5 into 1 and 6 into 1 collectors are special order items.
Please call for info.

Service Costs, Welding Rod,
Solar Flux