Abstract: A timbre-scaled exhaust assembly includes: an acoustic portion including an inlet collector including an entrance duct at a first end of the collector in fluid for receiving an exhaust flow from an internal combustion engine and exit ducts at a second end of the collector in fluid communication with a plurality of non-perforated tuning tubes; an outlet collector including entrance ducts in fluid communication with the plurality of non-perforated tuning tubes and an exit duct in fluid communication with an outlet of the exhaust assembly. The inlet collector splits the exhaust flow from the internal combustion engine into the plurality of tuning tubes such that a plurality of distinct exhaust flows pass through the plurality of tuning tubes and the outlet collector combines the exhaust flow. A combined exhaust flow exits the exhaust system through the exhaust tip.

Abstract: A cross-pipe exhaust assembly includes: a first inlet collector splitting into an upper outlet and a lower outlet; a second inlet collector splitting into an upper outlet and a lower outlet; a first outlet collector joining an upper inlet and a lower inlet into a single outlet; a second outlet collector joining an upper inlet and a lower inlet into a single outlet; a first inline conduit located between the first inlet collector and the first outlet collector; a second inline conduit located between the second inlet collector and the second outlet collector; a first crossover conduit between the lower outlet or upper outlet of the first inlet collector and the upper inlet or lower inlet; and a second crossover conduit extending between the lower outlet or the upper outlet and the upper inlet or lower inlet of the first outlet collector.

Abstract: A timbre-scaled exhaust assembly includes: an acoustic portion including an inlet collector including an entrance duct at a first end of the collector in fluid for receiving an exhaust flow from an internal combustion engine and exit ducts at a second end of the collector in fluid communication with a plurality of non-perforated tuning tubes; an outlet collector including entrance ducts in fluid communication with the plurality of non-perforated tuning tubes and an exit duct in fluid communication with an outlet of the exhaust assembly. The inlet collector splits the exhaust flow from the internal combustion engine into the plurality of tuning tubes such that a plurality of distinct exhaust flows pass through the plurality of tuning tubes and the outlet collector combines the exhaust flow. A combined exhaust flow exits the exhaust system through the exhaust tip.

Abstract: A cross-pipe exhaust assembly includes: a first inlet collector splitting into an upper outlet and a lower outlet; a second inlet collector splitting into an upper outlet and a lower outlet; a first outlet collector joining an upper inlet and a lower inlet into a single outlet of the first outlet collector; a second outlet collector joining an upper inlet and a lower inlet into a single outlet of the second outlet collector; a first inline conduit located between the first inlet collector and the first outlet collector; a second inline conduit located between the second inlet collector and the second outlet collector; a first crossover conduit extending between the first inlet collector and the second outlet collector; and a second crossover conduit extending between the second inlet collector and the first outlet collector.

Abstract: A timbre-scaled exhaust assembly includes: an acoustic portion including an inlet collector including an entrance duct at a first end of the collector in fluid for receiving an exhaust flow from an internal combustion engine and exit ducts at a second end of the collector in fluid communication with a plurality of non-perforated tuning tubes; an outlet collector including entrance ducts in fluid communication with the plurality of non-perforated tuning tubes and an exit duct in fluid communication with an outlet of the exhaust assembly. The inlet collector splits the exhaust flow from the internal combustion engine into the plurality of tuning tubes such that a plurality of distinct exhaust flows pass through the plurality of tuning tubes and the outlet collector combines the exhaust flow. A combined exhaust flow exits the exhaust system through the exhaust tip.

Abstract: A timbre scaled internal combustion exhaust system includes: an inlet collector including a single entrance duct at a first end of the collector in fluid communication with an exhaust flow from an internal combustion engine and an exit duct at a second end of the collector; a plurality of non-perforated parallel tuning tubes in fluid communication with the plurality of exit ducts of the inlet collector, the plurality of tuning tubes having lengths and diameters selected based on a desired note of the timbre scaled exhaust system; an outlet collector including a plurality of entrance ducts in fluid communication with the at least first and second tuning tubes and a single exit duct in fluid communication with an outlet of the exhaust system. The inlet collector splits the exhaust flow through the plurality of tuning tubes to create individual notes, and wherein the outlet collector combines the split exhaust flow to create a desired sound of internal combustion engine exhaust.

Abstract: A cross-pipe exhaust assembly includes: a first inlet collector splitting into an upper outlet and a lower outlet; a second inlet collector splitting into an upper outlet and a lower outlet; a first outlet collector joining an upper inlet and a lower inlet into a single outlet of the first outlet collector; a second outlet collector joining an upper inlet and a lower inlet into a single outlet of the second outlet collector; a first inline conduit located between the first inlet collector and the first outlet collector; a second inline conduit located between the second inlet collector and the second outlet collector; a first crossover conduit extending between the first inlet collector and the second outlet collector; and a second crossover conduit extending between the second inlet collector and the first outlet collector.

Abstract: A timbre scaled internal combustion exhaust system includes: an inlet collector including a single entrance duct at a first end of the collector in fluid communication with an exhaust flow from an internal combustion engine and an exit duct at a second end of the collector; a plurality of non-perforated parallel tuning tubes in fluid communication with the plurality of exit ducts of the inlet collector, the plurality of tuning tubes having lengths and diameters selected based on a desired note of the timbre scaled exhaust system; an outlet collector including a plurality of entrance ducts in fluid communication with the at least first and second tuning tubes and a single exit duct in fluid communication with an outlet of the exhaust system. The inlet collector splits the exhaust flow through the plurality of tuning tubes to create individual notes, and wherein the outlet collector combines the split exhaust flow to create a desired sound of internal combustion engine exhaust.