{"product_id":"texas-speed-1-72-shaft-mount-roller-rocker-package-tsp-172rr-cath-che-twin-shaft","title":"Texas Speed 1.72 Shaft Mount Roller Rocker Package — LS Cathedral-Port Cylinder Heads | TSP-172RR-CATH-CHE-TWIN-SHAFT","description":"\u003cp\u003eThe Texas Speed 1.72 Shaft Mount Roller Rocker Package is a steel 1.72 ratio shaft-style rocker upgrade built for LS engines with cathedral-port cylinder heads. The package pairs the Texas Speed Steel Cathedral 1.72 Ratio Roller Rocker set with a TSP\/CHE twin rocker shaft and rocker shaft bushings, converting the factory pedestal-mounted rockers to a shaft system.\u003c\/p\u003e\u003cp\u003eTexas Speed positions this package for performance street builds, higher rpm use and camshaft upgrades where valvetrain control matters, since the shaft mount keeps the rockers aligned and stable under higher spring loads and more aggressive lobes than the stock stamped rockers were designed for. The slightly higher 1.72 ratio also adds a small amount of valve lift over the factory 1.7 rockers with the same camshaft.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRocker ratio: 1.72\u003c\/li\u003e\n\u003cli\u003eMount type: Shaft mount with TSP\/CHE twin rocker shaft\u003c\/li\u003e\n\u003cli\u003eMaterial: Steel\u003c\/li\u003e\n\u003cli\u003eApplication: LS cathedral-port cylinder heads\u003c\/li\u003e\n\u003cli\u003eIncluded: Texas Speed Steel Cathedral 1.72 ratio roller rocker package, TSP\/CHE twin rocker shaft, rocker shaft bushings\u003c\/li\u003e\n\u003cli\u003eIntended use per Texas Speed: Performance street builds, higher rpm, camshaft upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKit Includes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTexas Speed Steel Cathedral 1.72 ratio roller rocker package\u003c\/li\u003e\n\u003cli\u003eTSP\/CHE twin rocker shaft\u003c\/li\u003e\n\u003cli\u003eRocker shaft bushings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch5\u003eWhat heads does the Texas Speed 1.72 shaft mount rocker package fit?\u003c\/h5\u003e\u003cp\u003eIt is designed for LS cathedral-port cylinder heads, which Texas Speed lists across Gen III and Gen IV LS 4.8L, 5.3L, 5.7L, 6.0L and 6.2L engines. It is not for rectangular-port LS3-style heads.\u003c\/p\u003e\u003ch5\u003eWhat is included in the 1.72 cathedral rocker package?\u003c\/h5\u003e\u003cp\u003eThe package includes the Texas Speed Steel Cathedral 1.72 ratio roller rocker set, a TSP\/CHE twin rocker shaft and the rocker shaft bushings needed to mount the rockers on the shaft.\u003c\/p\u003e\u003ch5\u003eHow does the 1.72 package differ from the Texas Speed 1.7 and 1.8 adjustable cathedral rockers?\u003c\/h5\u003e\u003cp\u003eThe 1.72 package is a steel, non-adjustable-style shaft mount set with a twin rocker shaft aimed at performance street and cam upgrade builds. The 1.7 and 1.8 adjustable packages use 17-4 stainless adjustable rockers recommended for solid roller camshafts.\u003c\/p\u003e\u003ch5\u003eWhy upgrade to shaft mount rockers on a cathedral-port LS?\u003c\/h5\u003e\u003cp\u003eTexas Speed recommends the shaft setup for improved valvetrain stability and long-term reliability in performance street builds, higher rpm use and camshaft upgrades where the stock pedestal rockers can lose control.\u003c\/p\u003e\u003ch5\u003eDoes the 1.72 ratio change valve lift?\u003c\/h5\u003e\u003cp\u003eYes, slightly. A 1.72 ratio multiplies camshaft lobe lift a little more than the factory 1.7 rockers, so valve lift increases marginally with the same camshaft. Check spring and retainer clearance for the extra lift.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What heads does the Texas Speed 1.72 shaft mount rocker package fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is designed for LS cathedral-port cylinder heads, which Texas Speed lists across Gen III and Gen IV LS 4.8L, 5.3L, 5.7L, 6.0L and 6.2L engines. It is not for rectangular-port LS3-style heads.\"}}, {\"@type\": \"Question\", \"name\": \"What is included in the 1.72 cathedral rocker package?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The package includes the Texas Speed Steel Cathedral 1.72 ratio roller rocker set, a TSP\/CHE twin rocker shaft and the rocker shaft bushings needed to mount the rockers on the shaft.\"}}, {\"@type\": \"Question\", \"name\": \"How does the 1.72 package differ from the Texas Speed 1.7 and 1.8 adjustable cathedral rockers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 1.72 package is a steel, non-adjustable-style shaft mount set with a twin rocker shaft aimed at performance street and cam upgrade builds. The 1.7 and 1.8 adjustable packages use 17-4 stainless adjustable rockers recommended for solid roller camshafts.\"}}, {\"@type\": \"Question\", \"name\": \"Why upgrade to shaft mount rockers on a cathedral-port LS?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Texas Speed recommends the shaft setup for improved valvetrain stability and long-term reliability in performance street builds, higher rpm use and camshaft upgrades where the stock pedestal rockers can lose control.\"}}, {\"@type\": \"Question\", \"name\": \"Does the 1.72 ratio change valve lift?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, slightly. A 1.72 ratio multiplies camshaft lobe lift a little more than the factory 1.7 rockers, so valve lift increases marginally with the same camshaft. Check spring and retainer clearance for the extra lift.\"}}]}\u003c\/script\u003e","brand":"Texas Speed \u0026 Performance","offers":[{"title":"Default Title","offer_id":50903765385264,"sku":"TSP-172RR-CATH-CHE-TWIN-SHAFT","price":863.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/TSP-172RR-CATH-CHE-TWIN-SHAFT_1_1.jpg?v=1793187488","url":"https:\/\/berryperformancesales.com\/products\/texas-speed-1-72-shaft-mount-roller-rocker-package-tsp-172rr-cath-che-twin-shaft","provider":"Berry Performance Sales","version":"1.0","type":"link"}