{"title":"Harley-Davidson 2-Into-1 Exhaust Systems","description":"\u003cp\u003e\u003cb\u003eHandcrafted Harley-Davidson 2-into-1 performance exhaust systems built by Irish Pig Performance in Henderson, Nevada. Designed for Milwaukee-Eight motorcycles including Road Glide, Low Rider S and Low Rider ST applications. Fabricated from 304\/304L stainless steel with stepped primary tubes and performance-oriented merge collectors. Built for strong exhaust velocity, torque and horsepower across the usable RPM range.\u003c\/b\u003e\u003c\/p\u003e","products":[{"product_id":"road-glide-performance-exhaust-deep-sound-aggressive-styling","title":"Irish Pig Performance 2-into-1 Harley-Davidson Road Glide","description":"\u003cp\u003e\u003cstrong\u003eIRISH PIG PERFORMANCE 2-INTO-1 PERFORMANCE EXHAUST Harley-Davidson Road Glide — Milwaukee-Eight Hand-built in Henderson, Nevada. \u003c\/strong\u003eThe Irish Pig Performance Road Glide 2-into-1 mid-length exhaust was developed for the 2022 Harley-Davidson Road Glide Milwaukee-Eight platform, with an emphasis on strong torque, horsepower, exhaust velocity and performance across the usable RPM\u003cstrong\u003e\u003cb\u003e range. \u003c\/b\u003e\u003c\/strong\u003eThis exhaust has proven to work exceptionally well on high-output Milwaukee-Eight combinations. When properly matched with the engine build, tuning and supporting components, it has performed effectively on a motorcycle producing 160 horsepower at the rear wheel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCONSTRUCTION \u0026amp; DESIGN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHand-fabricated performance 2-into-1 exhaust\u003c\/p\u003e\n\u003cp\u003ePremium stainless steel construction\u003c\/p\u003e\n\u003cp\u003eTIG welded with full back-purging for clean, high-quality internal welds\u003c\/p\u003e\n\u003cp\u003e Stepped 1.750” → 1.875” → 2.000” primaries\u003c\/p\u003e\n\u003cp\u003eCustom-fabricated 2.000” → 2.500” merge collector\u003c\/p\u003e\n\u003cp\u003e18-degree merge angle\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eO₂ Sensor Compatibility:\u003c\/b\u003e\u003cspan\u003e Supplied with 18mm O₂ sensor bungs for wideband sensors and 12mm reducer bushings for narrowband sensors\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e12” performance muffler\u003c\/p\u003e\n\u003cp\u003eStainless steel transmission mounting bracket\u003c\/p\u003e\n\u003cp\u003eDesigned to support stock through highly modified Milwaukee-Eight combinations\u003c\/p\u003e\n\u003cp\u003eEvery stainless exhaust is back-purged during TIG welding, helping prevent oxidation and contamination on the inside of the tubing. This produces cleaner internal welds and helps maintain a smooth exhaust-gas path through the system. This is not a mass-produced universal exhaust system. Primary lengths, step locations and collector geometry were developed to improve exhaust scavenging and maintain strong cylinder evacuation while supporting increased airflow as engine output rises. The result is an exhaust designed to deliver strong low- and mid-range torque without sacrificing upper-RPM horsepower.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBUILT FOR PERFORMANCE \u003c\/strong\u003eIdeal for Road Glide and other Milwaukee-Eight Touring builds ranging from stock and mild-cammed combinations through high-output builds approaching 160 horsepower at the rear wheel, provided the engine combination, tuning and supporting components are properly matched.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT USE \u0026amp; COMPLIANCE DISCLAIMER This is an aftermarket performance exhaust intended for closed-course competition, racing, track and off-highway use only. It is not represented as legal for use on public streets or highways. It is the purchaser’s responsibility to know and comply with all applicable federal, state and local laws and regulations, including emissions, noise and vehicle-equipment requirements, before purchasing, installing or operating this product. Laws and regulations vary by jurisdiction and may restrict the sale, installation or use of aftermarket exhaust systems. Irish Pig Performance LLC makes no representation that this product is legal for street or highway use in any particular jurisdiction.\u003c\/strong\u003e Irish Pig Performance LLC Built to Perform. Built by Hand. Irish Pig Performance.\u003c\/p\u003e","brand":"Irish Pig Performance ","offers":[{"title":"Raw Stainless Steel","offer_id":46615536173135,"sku":null,"price":1850.0,"currency_code":"USD","in_stock":true},{"title":"High-Temerature Black Ceramic","offer_id":46615536205903,"sku":null,"price":2150.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/2345\/6335\/files\/IMG_1258.jpg?v=1788373507"},{"product_id":"irish-pig-performance-2-into-1-harley-davidson-low-rider-s","title":"Irish Pig Performance 2-into-1 Harley Davidson Low Rider S Low Rider ST","description":"\u003cp\u003e\u003cb\u003eIRISH PIG PERFORMANCE 2-INTO-1  HARLEY-DAVIDSON LOW RIDER S  Low Rider ST\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt for Harley-Davidson Low Rider S and Low Rider ST riders looking for a performance 2-Into-1 exhaust with strong torque, responsive acceleration and horsepower that carries through the upper RPM range.\u003c\/p\u003e\n\u003cp\u003eEach Irish Pig Performance exhaust is hand-fabricated from premium stainless steel and TIG welded with full back-purging for clean, high-quality internal welds and unrestricted exhaust flow.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCONSTRUCTION \u0026amp; DESIGN\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e• Hand-fabricated stainless steel construction\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e• Stepped 1.750” → 1.875” → 2.000” primary tubes\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e• Custom-fabricated 2.000” → 2.500” merge collector\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e• 18-degree merge angle\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003c\/b\u003e• 12” performance muffler\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e• TIG welded with full back-purging\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e• Designed and fabricated in Henderson, Nevada\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eO₂ Sensor Compatibility:\u003c\/b\u003e Supplied with 18mm O₂ sensor bungs for wideband sensors and 12mm reducer bushings for narrowband sensors\u003c\/p\u003e\n\u003cp\u003eThe stepped-primary design and merge collector are engineered to promote efficient cylinder evacuation and exhaust scavenging. The system is designed to provide strong low- and mid-range torque while maintaining the flow capacity needed to support horsepower at higher RPM.\u003c\/p\u003e\n\u003cp\u003eThis exhaust is well suited for stock-displacement Milwaukee-Eight engines as well as performance combinations using aftermarket camshafts, cylinder-head work, increased compression, larger throttle bodies and other supporting modifications.\u003c\/p\u003e\n\u003cp\u003eFinal performance will depend on engine combination, fuel management and proper calibration.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFITMENT\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLOW RIDER S \/ LOW RIDER ST\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2020–Present Harley-Davidson Low Rider S (FXLRS)\u003c\/b\u003e\u003cbr\u003eMilwaukee-Eight® equipped models\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2022–Present Harley-Davidson Low Rider ST (FXLRST)\u003c\/b\u003e\u003cbr\u003eMilwaukee-Eight® equipped models\u003c\/p\u003e\n\u003cp\u003ePhysically verified fitment on 2023 Low Rider S and Low Rider ST.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMILWAUKEE-EIGHT SOFTAIL\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for\u003cspan\u003e \u003c\/span\u003e\u003cb\u003e2018–Present Harley-Davidson Milwaukee-Eight® Softail models equipped with the factory\/OEM transmission and compatible factory-style exhaust mounting configuration.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eApplications include M8 Softail platforms such as Low Rider, Street Bob, Fat Bob, Fat Boy, Heritage Classic, Softail Standard and Breakout.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFITMENT NOTE\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eAftermarket transmissions, floorboards, forward controls, saddlebags and other aftermarket or model-specific equipment may affect exhaust mounting or clearance. Contact Irish Pig Performance before ordering if there are any questions regarding your specific application.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFINISH OPTIONS\u003c\/b\u003e\u003cbr\u003eAvailable in\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eRaw Stainless Steel\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eHigh-Temperature Black Ceramic Coating\u003c\/b\u003e. High-temperature black ceramic coating is an\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eadditional $300\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCERAMIC COATING NOTICE:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eProper engine calibration and tuning are important when using a ceramic-coated exhaust. Excessive exhaust-gas temperatures or uneven cylinder temperatures caused by improper tuning may create localized hot spots, discoloration, or damage to the ceramic finish.\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eCoating damage resulting from excessive heat or improper engine tuning is not considered a coating defect.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIMPORTANT COMPLIANCE NOTICE\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThis is an aftermarket performance exhaust intended for closed-course competition, racing, track and off-highway use only.\u003c\/p\u003e\n\u003cp\u003eThis product is not represented as legal for use on public streets or highways. The purchaser is responsible for determining and complying with all applicable local, state and federal laws and regulations.\u003c\/p\u003e\n\u003cp\u003eIrish Pig Performance LLC makes no representation that this exhaust is legal for street or highway use in any jurisdiction.\u003c\/p\u003e","brand":"Irish Pig Performance ","offers":[{"title":"Raw Stainless Steel","offer_id":46615715774543,"sku":null,"price":1850.0,"currency_code":"USD","in_stock":true},{"title":"High-Temperature Black Ceramic","offer_id":46615715807311,"sku":null,"price":2150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/2345\/6335\/files\/Irish_Pig_LRS_IMG1611_lighting_corrected.jpg?v=1789083733"},{"product_id":"irish-pig-road-glide-full-length-performance-exhaust","title":"Irish Pig Harley-Davidson Road Glide Full-Length 2-Into-1 Performance Exhaust","description":"\u003ch2\u003e\n\u003cb\u003eIrish Pig Road Glide Full-Length Performance Exhaust\u003c\/b\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe Irish Pig Harley-Davidson Road Glide Full-Length 2-Into-1 Performance Exhaust takes the architecture of our Road Glide performance system and extends its tuning strategy into a full-length configuration designed for high-output Milwaukee-Eight combinations.\u003c\/p\u003e\n\u003cp\u003eThis system uses\u003cspan\u003e \u003c\/span\u003e\u003cb\u003ethree-step 304\/304L stainless-steel primaries — 1.750” → 1.875” → 2.000” — with the 2.000” final primary section extended approximately 7.5 inches on each cylinder\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003ecompared with our shorter Road Glide configuration.\u003c\/p\u003e\n\u003cp\u003eThe additional primary length isn’t simply there to make the pipe longer. Increasing the length of the final 2.000” section changes the timing of the returning pressure waves within the exhaust system. The design is intended to shift the system’s tuning characteristics toward a\u003cspan\u003e \u003c\/span\u003e\u003cb\u003ebroader, more sustained torque curve while maintaining strong upper-rpm breathing capability.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eBoth stepped primaries feed a performance merge collector before transitioning into a\u003cspan\u003e \u003c\/span\u003e\u003cb\u003e2.500” diameter, 32.5” full-length exhaust section measured from the collector outlet.\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eThe longer downstream section provides additional exhaust volume and changes the reflected-wave behavior compared with a short-exit system.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003ePERFORMANCE CHARACTERISTICS\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe stepped-primary architecture is designed to maintain exhaust-gas velocity during the earlier stages of the exhaust event while progressively increasing cross-sectional area as gas volume and engine demand increase.\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cb\u003e1.750” initial primary\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003epromotes gas velocity and exhaust-energy retention leaving the cylinder. The transition into\u003cspan\u003e \u003c\/span\u003e\u003cb\u003e1.875” tubing\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eincreases flow capacity without making an abrupt jump in cross-sectional area. The final\u003cspan\u003e \u003c\/span\u003e\u003cb\u003e2.000” primary section\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eprovides substantially greater flow capacity for larger-displacement and higher-output M8 combinations.\u003c\/p\u003e\n\u003cp\u003eExtending that final 2.000” section also increases the distance traveled by pressure waves before they return toward the exhaust valve. Combined with the merge collector and long 2.500” outlet section, this gives the system a very different tuning strategy from a short, rapidly terminating race exhaust.\u003c\/p\u003e\n\u003cp\u003eThe objective is\u003cspan\u003e \u003c\/span\u003e\u003cb\u003estrong cylinder evacuation, effective scavenging and a broad usable powerband rather than concentrating the exhaust’s tuning effect into a narrow RPM window.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eENGINE COMBINATIONS\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThis system is particularly suited to performance Milwaukee-Eight combinations where airflow demand has moved beyond a basically stock engine.\u003c\/p\u003e\n\u003cp\u003ePotential applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e117–135+ CI Milwaukee-Eight combinations\u003c\/li\u003e\n\u003cli\u003ePerformance camshaft packages\u003c\/li\u003e\n\u003cli\u003ePorted or high-flow cylinder heads\u003c\/li\u003e\n\u003cli\u003eLarger throttle bodies and intake manifolds\u003c\/li\u003e\n\u003cli\u003eIncreased compression combinations\u003c\/li\u003e\n\u003cli\u003eLarger valves and higher-flow induction systems\u003c\/li\u003e\n\u003cli\u003eCompetition and high-performance builds requiring increased exhaust-flow capacity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOn moderate combinations, the stepped architecture is intended to preserve exhaust velocity rather than simply overwhelming the engine with excessive primary diameter. As displacement, cylinder-head flow, camshaft duration and RPM demand increase, the larger downstream sections provide the additional cross-sectional area necessary to support greater mass flow.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eBUILT AROUND EXHAUST DYNAMICS — NOT JUST PIPE DIAMETER\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eA performance exhaust is more than a large tube attached to an engine.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePrimary diameter, step location, primary length, collector geometry, outlet diameter and overall system length all influence how pressure waves travel through the exhaust and interact with the engine during valve overlap.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe Irish Pig Full-Length Performance Exhaust combines those elements into a system designed around\u003cspan\u003e \u003c\/span\u003e\u003cb\u003egas velocity, wave timing, scavenging and high-flow capacity\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003efor performance-oriented Milwaukee-Eight engines.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHand fabricated from 304\/304L stainless steel by Irish Pig Performance in Henderson, Nevada.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eEMISSIONS NOTICE — COMPETITION USE ONLY\u003cbr\u003e\u003cspan\u003eThis product is intended for closed-course competition use only and is not intended for use on public highways. This product has not been granted an exemption by the California Air Resources Board (CARB) for use on emissions-controlled highway motorcycles. Purchaser is responsible for determining compliance with all applicable federal, state, and local laws.\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e","brand":"Irish Pig Performance ","offers":[{"title":"Default Title","offer_id":46784817725519,"sku":null,"price":2050.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/2345\/6335\/files\/IMG_1645.jpg?v=1789520337"}],"url":"https:\/\/irishpigperformance.com\/collections\/harley-davidson-2-into-1-exhaust-systems.oembed","provider":"Irish Pig Performance ","version":"1.0","type":"link"}