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2. Tuned exhaust - Wikipedia

   en.wikipedia.org/wiki/Tuned_exhaust

   A 4-2-1 exhaust system is a type of exhaust manifold for an engine with four cylinders per bank, such as an inline-four engine or a V8 engine. The layout of a 4-2-1 system is as follows: four pipes (primary) come off the cylinder head , and merge into two pipes (secondary), which in turn finally link up to form one collector pipe.

3. Expansion chamber - Wikipedia

   en.wikipedia.org/wiki/Expansion_chamber

   When the descending piston first exposes the exhaust port on the cylinder wall, the exhaust flows out powerfully due to its pressure (without assistance from the expansion chamber) so the diameter/area over the length of the first portion of the pipe is constant or near constant with a divergence of 0 to 2 degrees which preserves wave energy.

4. Hirth F-23 - Wikipedia

   en.wikipedia.org/wiki/Hirth_F-23

   A belt reduction drive system, fuel injection, tuned exhaust and electric start are optional. [1] [2] The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil. Recommended time between overhauls is 1000 hours. [1] [2] The F-23 produces 50 hp (37 kW) at 6150 rpm and 40 hp (30 kW) at 5500 rpm. [1] [2]

5. Exhaust manifold - Wikipedia

   en.wikipedia.org/wiki/Exhaust_manifold

   1. manifold; 2. gasket; 3. nut; 4. heat shield; 5. heat shield bolt. Ceramic-coated exhaust manifold on the side of a performance car. In automotive engineering, an exhaust manifold collects the exhaust gases from multiple cylinders into one pipe. The word manifold comes from the Old English word manigfeald (from the Anglo-Saxon manig [many ...

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Arrow (motorcycle part manufacturer) - Wikipedia

   en.wikipedia.org/wiki/Arrow_(motorcycle_part...

   History. Arrow was founded in 1985 in Italy by Giorgio Giannelli to make high performance exhaust systems. The company's first association with motorsports success was with Belgian rider Jobé winning the 500 cc Motocross World Championship. Since 2000 Arrow parts have been used on bikes that won 20 World Titles, in SBK, SS, MX and Supermoto. [1]