Products: Exhaust

Headers

New for 2011 -
Our unique stepped primary 4 - 2 - 1 ( Tri -Y ) has now been further improved with a dyno developed merge collector.

The new header is on the top in the left photo with a closeup of the new merge collector on the bottom in the right photo.

 

For the Volvo B18/B20 we offer two headers - a 4-1 race header that is made to order, and a new 4-2-1 "tri-Y" header custom made to our specifications right here in northern New York. It is similar in general concept to the header we imported from Europe several years ago, but with several improvements and better quality control. As in the photo below, the header has a stepped primary tube design, and new for 2011 a merge collector based on recent dyno testing. It was designed to provide clearance for a variety of intake manifolds, alternator clearance, and upper A arm clearance on 122s & 1800s set up with less than stock camber. It is less expensive than a 4 into 1 of comparative quality, and allows more room for plumbing. The tri-Y design normally produces more torque and has a wider power band in most applications, but in race applications may yield less peak horsepower at high RPM than a properly designed 4-1 header. Due to its broader power band, the 4-2-1 is recommended for most applications from street, to autocross, to rallying, and even road racing applications where a broader power band is more important than high RPM peak power.  Well worth the cost as compared to other available headers whose only attribute is their lower cost.

 

Street Performance 4-2-1 headers - New and improved for 2011 with a merge collector,  made in the USA for 544s, 122s, 1800s, and 140s. Developed on the dyno to increase power and torque over a wide RPM range. Will work with a variety of intakes but may not fit on cars with generators. Normally stocked with silver ceramic coating.  Coated with merge collector $ 475. Coated with straight collector and O2 sensor mount $475.  Uncoated $325.

4 - 2 - 1 headers for 240s, 740s and 940s, imported from Sweden on special order.

Custom Built Race headers 4 - 1 - $ 500 - $ 600 depending on type and  tube size - add $160 for ceramic coating

Ceramic Coating of any of the headers, black or silver - $160

Adaptors for oxygen sensors for FI or air/fuel ratio gauges added to any header - $25

 

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Exhaust System Components

Mandrel bent, stainless steel tube system components. 

Stock 1 3/4 inch tube just won't accommodate performance increases so our components are 2.5 inch - the size we have found works best on our performance engines. To the left is a comparason of the over the axle tube secion from a 73 1800ES with one of our 2.5 " component sections.

 

Selected performance exhaust system components for 122 sedans and 1800s in stainless steel. These are not complete systems but mandrel bent 2.5 inch stainless steel tubing pieces that we use to build systems in our shop and that will allow you to build a performance system for your car, or provide them to your local muffler shop and let them finish it up for you.  For most applications mufflers, resonators and mandrel bent tubing are available.  The tubing sections are designed based on using one muffler ( dynomax ultra flow recommened - see below ) , before the axle and a resonator at the rear next to the gas tank.  Although designed to attach to our exhaust headers the tubing can be adapted to other headers and stock exhaust manifolds.   Components are available separately so that you can use them to make custom systems with your choice of mufflers. When available - complete sets of stainless steel 2.5 inch mandrel bent exhaust tubes for most models without mufflers - $270. Over the axle stainless tube section as a separate piece - 122 - $165, 1800 ( welded together in 4 sections - $185.  Email for more details.

Mufflers -

Customers often ask us for muffler recommendations. After much testing ( street, track, and dyno ) and years of use, for performance applications we recommend the Dynomax Ultra Flow mufflers. http://www.dynomax.com/mufflers.php?muffler=ultraflowelded. Usually part # 17222 for a stainless steel 2.5 " offset inlet and outlet muffler, or # 17219 for offset and center inlet and outlet. These are also available in non stainless versions and in 2 " and 2.25 "  inlet/outlet diameters. For a round muffler that takes up less space and can be used as a resonator we have used - http://www.dynomax.com/mufflers.php?muffler=racebullet. As it is designed as a race muffler it is not quiet enough to be used on the street by itself but makes a good resonator.  With one of each on the system you will get a nice mellow sound - loud enough to be heard when the throttle is opened up, but not loud enough to be disturbing either while idling, or under cruise conditions.  There may be other mufflers that will work, but these are the ones we have tested and know will do the job at a reasonable price.

 

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