He fabricated his own pipe. Forty years and 250,000 pipes later, D&D Exhaust exhaust systems are some of the leading performance motorcycle exhaust systems in the world. Built by reputation of excellent customer service, quality in every detail of the product, and the basic value of a system that performs as specified. MGB V8 - Twin pipe exhaust system. I was very disappointed with the previous exhaust on this car - it was an aftermarket sports system and completely the wrong shape - it sat about an inch from the ground. In general terms, a V-8 engine that runs a single turbo in the range of 6 to 15 pounds of boost requires a minimum 3-inch exhaust, while a twin-turbo setup exhaust pipe requires only a 2.5-inch exhaust. As you increase boost, the exhaust pipe diameter needs to increase proportionately. Fujitsubo’s Legalis R exhaust is a popular choice for the S30 — featuring a full stainless steel twin 2″ pipe system. The exhaust note is throaty and you’ll often get a nice crackle the end. Fujitsubo offers a header-back exhaust system which sounds beautiful on its own, but you can also purchase a matching Fujitsubo Legalis R header to really improve the sound and performance of this system. After the manifold, the pipes lead to the catalytic converter and muffler. If your vehicle has a single exhaust, the pipe coming out of each manifold is jointed in a Y before the catalytic converter and muffler. A single exhaust has one of each while a dual exhaust has two of each. A dual exhaust may also have an H pipe before the converters to help control back pressure and increase horsepower. This is a crossover between the two exhaust pipes, and it forms an H with the exhaust pipes. Dual. Complete Dual Muffler Exhaust System Twin Pipe Silencer For Honda CRF230F 03-16 Product Description. Features 100% Brand New, Never Mounted, High Quality . Reducing Overall Weight For Top Performance To Obtain Max Output . Price Is For A Complete Dual Muffler Exhaust System. Pypes Performance Exhaust is the manufacturer of exhaust systems, headers, downpipes, mufflers, x-pipes and more for your classic or late model muscle car. If you want people to turn their heads when you drive by, make sure you Blow It Out Your Pypes. Featuring dual 2” stainless pipes from collector to exhaust tips, a polished stainless center resonator/H-pipe, and a polished stainless round muffler with twin vertical slash tips, this exhaust system has the flow, low-key sound and looks unmatched by any other exhaust system on the market. Because the exhaust gases exit each manifold through two pipes rather than just one, they can exit the engine faster and provide additional horsepower gains. Dual exhaust systems help reduce backpressure, which can save energy and increase the engine’s efficiency for better gas mileage. When it comes to dual exhaust systems, an X-pipe will cross over in the middle and produce the least amount of power loss in comparison to an H-pipe. Some of the exhaust systems we have include an H-pipe or an X-pipe, because adding such a pipe to a dual exhaust system has been proven to unleash more horsepower. When two close firing cylinders are exhausting on one cylinder bank, nothing is happening in the other bank, so connecting both pipes effectively enlarges.