{"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\/products\/irish-pig-road-glide-full-length-performance-exhaust","provider":"Irish Pig Performance ","version":"1.0","type":"link"}