The Ultimate Exhaust System for your race car!

This original Brzezinski Racing Products design routes the exhaust pipes from each side of the engine into one common collector. With this design we are tricking the engine into thinking it is firing every 90 degrees as opposed to the random firing of dual outlet systems.

2-into-1 systems have a dramatic effect on power from 3500 to 7000 rpm.

The most important fact to remember when building your system is that the primary pipes need not be routed in any particular way to gain the added horsepower of the 2-into-1 effect. Installing the system over the top is only one way the system can be routed.

While “over the top” installation is generally easier, a system underneath the car will achieve the same power figures. The engine doesn’t care how the exhaust pipes are routed.

However, NOT running your two exhaust pipes into one of our collectors will cost you 15 to 35 horsepower!

Corvette Manifold2-into-1 Dyno Test

As you can see in the dyno test results in the dyno chart at right, there is a 29 hp gain at 5000 rpm with the addition of a 2-into-1 System.

   

Center Dimensions for the "over the top" 2-into-1 System.

Left Side Dimensions consist of three 90 degree pipes and         Right Side Dimensions consist of four 90 degree pipes

one 45 degree pipe leading into the collector.                            leading into the collector.

2-into-1 Exhaust System Kits:

The Ultimate Exhaust System!

Save $$$ over buying individual parts.

• Produce 15 to 35 more horsepower than dual pipes.
• Quieter than dual systems.
• Additional 45 °, 90 ° and straight pipes available.
• Can be constructed over the top or under the car.

  2-into-1 Exhaust Kits are an excellent starting point for your exhaust system. Because all race cars and exhaust systems are a little different, you may need additional parts to install the system on your race car.

  NOTE: 2-into-1 Exhaust Kits are available with any combination of 1 gasketless pipe kit, 6 primary pipes (either #167, 168, 167A or 168A), 1 Collector (either #169, #170 or #169B) and (2) 12" section of 2 1/2" or 3" straight pipe for the same price as our #171 Kits.

2-into-1 Collector

The key component of the 2-into-1 System

We have run countless dyno tests on 2-into-1 versus dual pipe systems. Whenever the primary pipes are routed

into one of our collectors, 15 to 35 housepower is gained.

Tips for Building your 2-into-1 System . . .

1. Optimum Primary Pipe Length — Keep the primary pipes as short as possible. Systems are designed around individual 90° and 45° bends, which are 12" long. Do not use more than 72" of pipe on each side. This translates into a maximum of 6 pipes per side. Three horsepower will be lost for each additional 12" section beyond 72". These recommendations are based on dyno tests with stock and modified Corvette, Chevy II and Log manifolds.
   
2. Unequal Length Primary Pipes are OK — Our dyno tests have concluded that variations in primary length have no adverse effect on power when a collector is used. Primary pipes which are equal in length, or as close as possible, are preferred, but in some applications this is just not possible. So, if your pipes going into the collector are not equal, don’t worry.
   
3. Pipe Length for Dual Pipe System — If you are restricted to a dual pipe system, pipes should be 45" to 55" in length, equal on each side, and run a balance tube the same diameter as the exhaust pipe.
   
4. Secondary Pipe Length — Run a minimum of 12" of secondary pipe after the collector. Adding more length has little effect on power. In other words, “We’ve run 1 to 6 feet of secondary pipe and noticed absolutely no power difference.”