H-Pipe, X-Pipe, 1, 2, 3...
The intermediate system we tested consisted of a BBK 21/2-inch short off-road X-pipe and a set of used unknown brand race-type mufflers with turndowns. This system was a big improvement soundwise over open headers, but we immediately noticed that the engine ran considerably richer, suggesting that the exhaust was acting like a big cork. A test with an 02 sensor exhaust probe showed the engine to be running about two jets sizes fat. View Related Article
|
|