{"product_id":"isr-performance-hgc-ls-swap-header-nissan-350z-03-08-1-3-4","title":"ISR Performance HGC LS Swap Header - Nissan 350Z 03-08 - 1 3\/4\"","description":"\u003cp\u003eThe ISR Performance HGC LS Swap Headers are the dedicated exhaust manifold pair for GM LS engine swaps into the 2003-2008 Nissan 350Z (Z33). Built from 304 stainless steel with 1 3\/4 inch primary tubing, designed to pair with ISR LS swap mounts and provide maximum ground clearance under the lowered Z33 chassis. The \"HGC\" (High Ground Clearance) designation refers to the routing, which is engineered to clear chassis components and maximize underbody clearance.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eLS-swapped 350Z builds traditionally require either custom-fabricated headers or generic universal headers that compromise on ground clearance and fitment. These purpose-built HGC headers solve that problem out of the box. They bolt to the LS engine on each side and route the exhaust path to maximize clearance under the lowered Z33 chassis, then mate to the factory 350Z Y-pipe for a clean install, or to the ISR LS swap Y-pipe (sold separately) when upgrading to a complete ISR exhaust path.\u003c\/p\u003e\n\n\u003cp\u003e1 3\/4 inch primary tubing provides excellent flow for higher horsepower applications without sacrificing low-end response on smaller-cube LS engines.\u003c\/p\u003e\n\n\u003ch3\u003eCritical Fitment Requirements\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eISR Performance LS Swap Mounts (IS-350-LSMKT or IS-350-LSMKT-MO) required.\u003c\/strong\u003e The HGC headers were engineered around the engine position set by the ISR LS mount kit. Different mount brands will not produce a guaranteed bolt-on fit.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2007-2008 build date 07\/06 to 11\/06:\u003c\/strong\u003e May need to modify the factory steering rack hardlines for header clearance. Check your production date and steering rack to confirm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS3 engines with OEM knock sensors:\u003c\/strong\u003e Need to relocate the knock sensor to an alternate mounting boss for proper clearance from the primaries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExhaust Path Options\u003c\/h3\u003e\n\u003cp\u003eMultiple downstream options are supported:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the factory 350Z Y-pipe and catback:\u003c\/strong\u003e Quick install path, headers mate directly to the OEM Y-pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgrade to the ISR LS Swap Y-pipe and ISR catback:\u003c\/strong\u003e Complete ISR exhaust path\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2003-2008 Nissan 350Z (Z33) with GM LS engine swap on ISR LS swap mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Driver side LS swap header\u003c\/li\u003e\n\u003cli\u003e1x Passenger side LS swap header\u003c\/li\u003e\n\u003cli\u003eGaskets and required hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e ISR Performance\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e IS-SSHD-350LS\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eType:\u003c\/strong\u003e LS Swap Exhaust Headers (Pair, HGC routing)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eVehicle Fitment:\u003c\/strong\u003e 2003-2008 Nissan 350Z (Z33)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eEngine:\u003c\/strong\u003e GM LS series (LS1, LS2, LS3, LSx)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 Stainless Steel\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003ePrimary Diameter:\u003c\/strong\u003e 1 3\/4 inch\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eRouting:\u003c\/strong\u003e HGC (High Ground Clearance)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eRequired Companion Part:\u003c\/strong\u003e ISR Performance 350Z LS Swap Mount Kit (IS-350-LSMKT or IS-350-LSMKT-MO)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eDownstream Compatibility:\u003c\/strong\u003e Factory 350Z Y-pipe, or ISR LS Swap Y-pipe\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eProduction Date Note:\u003c\/strong\u003e 07\/06 to 11\/06 build dates may require steering rack hardline modification\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eLS3 Note:\u003c\/strong\u003e OEM knock sensor relocation required for primary clearance\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eSold:\u003c\/strong\u003e Pair (driver and passenger)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eLegality:\u003c\/strong\u003e Off-road and competition use only\u003c\/p\u003e","brand":"ISR Performance","offers":[{"title":"Default Title","offer_id":45957123899589,"sku":"IS-SSHD-350LS","price":907.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/2718\/9701\/files\/IMG_5772__36345.1484949498.1280.1280__18587.1630073068.500.659.jpg?v=1773346585","url":"https:\/\/www.isrcompetition.com\/products\/isr-performance-hgc-ls-swap-header-nissan-350z-03-08-1-3-4","provider":"ISR Competition","version":"1.0","type":"link"}