{"product_id":"twin-cam-touring-big-bore-series","title":"TWIN CAM SERIES","description":"\u003cp\u003eThe \u003cstrong\u003eTWIN CAM\u003c\/strong\u003e Series Exhaust System is a purpose-built exhaust platform engineered for high-output Harley-Davidson® V-twin engines. Designed specifically for all 88–131ci+ Twin Cam combinations, every aspect of the system focuses on maximizing exhaust velocity, improving scavenging efficiency, and supporting stable high-horsepower performance without the compromises commonly found in oversized exhaust systems.\u003c\/p\u003e\n\u003cp\u003eAt the center of the system is a true merge collector featuring a precisely engineered 15° convergent angle. This collector design improves exhaust pulse scavenging and cylinder evacuation, resulting in stronger midrange torque, faster throttle response, and improved top-end power delivery.\u003c\/p\u003e\n\u003ch2\u003eTwin Cam Series Configurations\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003e124 Series\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eDesigned for engines up to 124ci, this configuration prioritizes strong usable torque and responsive midrange power.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep-Tuned Primary Sizes:\u003c\/strong\u003e\u003cbr\u003e1.75” → 1.87” → 2.00”\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMuffler Configuration:\u003c\/strong\u003e\u003cbr\u003e2.50” perforated core inside a 4.00” outer shell\u003c\/p\u003e\n\u003cp\u003eThe smaller primary sizing and 2.50” core help maintain exhaust gas velocity for excellent throttle response, strong midrange torque, and broad usable power while still delivering a deep, aggressive exhaust tone.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003e131 Series\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eBuilt for 131ci and larger engines requiring maximum airflow and high-RPM performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep-Tuned Primary Sizes:\u003c\/strong\u003e\u003cbr\u003e1.87” → 2.00” → 2.12”\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMuffler Configuration:\u003c\/strong\u003e\u003cbr\u003e3.00” perforated core inside a 4.00” outer shell\u003c\/p\u003e\n\u003cp\u003eThe increased primary volume and larger 3.00” core support the airflow demands of extreme displacement combinations while maintaining efficient scavenging, strong top-end pull, and a hard-hitting exhaust note.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"text-decoration: underline;\"\u003e135+ Series\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eBuilt for 135ci and larger engines requiring maximum airflow and high-RPM performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep-Tuned Primary Sizes:\u003c\/strong\u003e\u003cbr\u003e1.87” → 2.00” → 2.12”→ 2.25\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMuffler Configuration:\u003c\/strong\u003e\u003cbr\u003e3.00” perforated core inside a 4.00” outer shell\u003c\/p\u003e\n\u003cp\u003eThe increased primary volume and larger 3.00” core support the airflow demands of extreme displacement combinations while maintaining efficient scavenging, strong top-end pull, and a hard-hitting exhaust note.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eAll Twin Cam systems share identical routing, collector placement, and chassis fitment. The only difference is the primary tube sizing and muffler core diameter, allowing each system to be properly matched to engine displacement and performance goals.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eThermal Management\u003c\/h2\u003e\n\u003cp\u003eOptional full-length, one-piece heat shields provide clean styling, improved heat management, and added durability while maintaining a smooth, uninterrupted appearance.\u003c\/p\u003e\n\u003ch2\u003eBuilt for Big-Inch Performance\u003c\/h2\u003e\n\u003cp\u003eFrom the step-tuned head pipes and true merge collector to the application-specific muffler designs, the\u003cstrong\u003e Twin Cam\u003c\/strong\u003e Exhaust System was engineered as a complete performance package for riders pushing Twin Cam performance well beyond factory limits.\u003c\/p\u003e","brand":"Steel City Cycle LLC","offers":[{"title":"Up to 124ci \/ Brushed Stainless (Standard) \/ No Heatshields (+$0)","offer_id":48598074097819,"sku":null,"price":2150.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Brushed Stainless (Standard) \/ Full Length Heatshields (+$300)","offer_id":48598074130587,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Mirror Polished \/ No Heatshields (+$0)","offer_id":48598074163355,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Mirror Polished \/ Full Length Heatshields (+$300)","offer_id":48598074196123,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Black \/ No Heatshields (+$0)","offer_id":48598074228891,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Black \/ Full Length Heatshields (+$300)","offer_id":48598074261659,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Dark Bronze \/ No Heatshields (+$0)","offer_id":48598074294427,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Dark Bronze \/ Full Length Heatshields (+$300)","offer_id":48598074327195,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Gold \/ No Heatshields (+$0)","offer_id":48598074359963,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Gold \/ Full Length Heatshields (+$300)","offer_id":48598074392731,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Silver \/ No Heatshields (+$0)","offer_id":48598074425499,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"Up to 124ci \/ Cerakote Silver \/ Full Length Heatshields (+$300)","offer_id":48598074458267,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Brushed Stainless (Standard) \/ No Heatshields (+$0)","offer_id":48066674229403,"sku":null,"price":2150.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Brushed Stainless (Standard) \/ Full Length Heatshields (+$300)","offer_id":48066674262171,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Mirror Polished \/ No Heatshields (+$0)","offer_id":48066674294939,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Mirror Polished \/ Full Length Heatshields (+$300)","offer_id":48066674327707,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Black \/ No Heatshields (+$0)","offer_id":48066674360475,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Black \/ Full Length Heatshields (+$300)","offer_id":48066674393243,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Dark Bronze \/ No Heatshields (+$0)","offer_id":48066674426011,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Dark Bronze \/ Full Length Heatshields (+$300)","offer_id":48066674458779,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Gold \/ No Heatshields (+$0)","offer_id":48066674491547,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Gold \/ Full Length Heatshields (+$300)","offer_id":48066674524315,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Silver \/ No Heatshields (+$0)","offer_id":48066674557083,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"131ci \/ Cerakote Silver \/ Full Length Heatshields (+$300)","offer_id":48066674589851,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Brushed Stainless (Standard) \/ No Heatshields (+$0)","offer_id":48066674622619,"sku":null,"price":2150.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Brushed Stainless (Standard) \/ Full Length Heatshields (+$300)","offer_id":48066674655387,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Mirror Polished \/ No Heatshields (+$0)","offer_id":48066674688155,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Mirror Polished \/ Full Length Heatshields (+$300)","offer_id":48066674720923,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":false},{"title":"135ci+ \/ Cerakote Black \/ No Heatshields (+$0)","offer_id":48066674753691,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Cerakote Black \/ Full Length Heatshields (+$300)","offer_id":48066674786459,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Cerakote Dark Bronze \/ No Heatshields (+$0)","offer_id":48066674819227,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Cerakote Dark Bronze \/ Full Length Heatshields (+$300)","offer_id":48066674851995,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Cerakote Gold \/ No Heatshields (+$0)","offer_id":48066674884763,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Cerakote Gold \/ Full Length Heatshields (+$300)","offer_id":48066674917531,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Cerakote Silver \/ No Heatshields (+$0)","offer_id":48066674950299,"sku":null,"price":2450.0,"currency_code":"USD","in_stock":true},{"title":"135ci+ \/ Cerakote Silver \/ Full Length Heatshields (+$300)","offer_id":48066674983067,"sku":null,"price":2750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/0542\/1467\/files\/20260428_150313.jpg?v=1778206741","url":"https:\/\/steelcitycc.com\/products\/twin-cam-touring-big-bore-series","provider":"Steel City Cycle LLC","version":"1.0","type":"link"}