7.

The two exhaust systems used on the TR6 correspond to the exhaust manifolds: The early setup features a single branch, and the 1972-and-up one uses a pair of pipes.

8.

Moss Motors offers a pair of exhausts for the 1972-and-up Triumph TR6: the standard setup and the upmarket Tourist Trophy. For about $30 more, the Tourist Trophy system gets you a show- quality setup that sounds much sportier without being too loud.

9.

Now this is what the back of a TR6 should look like, featuring the classic twin pipes of the Moss Motors Tourist Trophy exhaust. The fit and finish are fantastic.

10.

Despite receiving all of these modifications, our Triumph’s max horsepower remained the same. Was the session a bust? Hardly. What was previously an unhappy little car now hums along smoothly.

A QUICK 5 HORSEPOWER

During our initial testing, we ran our Triumph TR6 with and without the stock air-cleaner assembly. Wow, what a difference: The stock air cleaner was costing us 6 horsepower. Since you really shouldn’t drive around without an air cleaner, we ordered some simple foam sock-type air cleaners from The Winner’s Circle. They may not have the look of the original air cleaner, but some follow-up dyno work showed they only cost us 1 horsepower. We could live with that.