that squash the pipe and can only fabricate exhaust from 2 -inch diameter tubing, Mopar owners are fortunate to have one of the best resources available for aftermarket exhaust, Tube Technologies, Inc. (tti). TTI has been making all types of Mopar exhaust components since they were founded, concentrating on the fit and quality of their products and catering to Mopar enthusiasts who want great exhaust at a reasonable price. TTI is also known for designing systems for engine swaps and for use with aftermarket heads, like our Indy 440-1s, that have raised exhaust ports requiring special headers.
In addition to the raised-port Indy heads, our B-Body presented some other challenges when it came to the exhaust. Being equipped with a four-speed, the headers would need to clear the clutch linkage without interference. We also upgraded our Plymouth's suspension with oversize torsion bars up front, and an aftermarket sway bar for the rear. Our concern was that these items would interfere with the exhaust, requiring either custom pipes or for the exhaust to be made with smaller diameter tubing than our desired three inches. Knowing that if anyone had an exhaust system that would fit this application it was tti, we visited their website, ttiexhaust.com and found just what we needed.
We installed tti's step headers in an earlier article during the engine installation phase of our project, and were very impressed with the fit of their product. Even with oversize torsion bars and an 11-inch clutch the headers, with primary tubes that step from two inches up to 21/8 inches, cleared everything with room to spare. Better yet, unlike some designs these headers have no slip-tubes, which are prone to leak, and all of the primary tubes travel over the centerlink to give maximum ground clearance. The headers are made from heavy gauge material, with 3/8-inch thick flanges and come with collectors and all the necessary hardware for installation. In fact the only sacrifice necessary to install these headers is to run a specific aftermarket starter. We planned to install a new high-torque starter anyway so the extra expense really didn't affect the total cost for our project.
Impressed with their headers, we chose tti products to complete our exhaust system and quickly found a kit to specifically fit our application while on their website. Though we'll be attaching our exhaust to tti headers, they also offer exhaust to fit Mopar factory exhaust manifold applications, as well as exhaust systems that will bolt up to other manufacturers' headers. Our car was originally equipped with turn-downs at the end of the tailpipes so that's what we ordered, but tti also offers kits for factory exhaust tips and has the tips as well. A quick call to tti confirmed that the three-inch exhaust system we were considering would not only fit our '71 B-Body and clear the rear sway bar but was available in either aluminized or stainless steel tubing. Better yet, the stainless steel kit we chose was in stock and would be shipped to us quickly.
When we received our products from tti a few days later, we were first impressed with the packaging of the exhaust. Nothing is worse than exhaust tubing that is crushed or bent during shipping, preventing the slip-joints from properly going together. Wanting to prevent this problem before it happens, tti obviously takes great care to individually protect the end of each pipe with foam, and then wrap each piece in bubble-wrap before they are packed into the shipping box. Once unpacked, the quality of the exhaust system was apparent. TTI uses computer controlled machinery, and exhaust components feature mandrel bends to ensure consistent tube diameter. Eager to drive our car on the road, we put it on the lift and began installing our new exhaust system.
1 Installing a large displacement...
1 Installing a large displacement engine, especially with raised exhaust port cylinder heads, requires special exhaust components. Fortunately, we found everything we needed on Tube Technology's website, ttiexhaust.com.
2 The tti headers we chose...
2 The tti headers we chose for our application feature thick 3/8-inch flanges, and the primary tubes are stepped from 2 to 21/8 inches for good high-rpm flow without sacrificing torque. All of the hardware and exhaust collectors were included, making installation easy.
3 We installed our headers...
3 We installed our headers with the engine in a previous article, and were impressed with the clearance they provided around the engine, clutch linkage, and even our oversize torsion bars. The only special requirement with these headers is a specific starter, which is available from Powermaster Performance.