{"product_id":"pdm-lbzlmmrh","title":"Industrial Injection Industrial Injection 2006-2010 LBZ LMM Duramax Ported  Polished Cylinder Heads (RH  LH Set) PDM-LBZ LMMRH | PDM-LBZLMMRH","description":"\u003cp\u003eHeads are first jet washed in a high-pressure spray cabinet to remove oil and dirt, then glass beaded to remove carbon. Next they are checked by magnafluxing, (cast iron only) or pressure testing. They are visually inspected for defects that would make them unusable. Valve guides and seats are removed as needed for porting.\n\nPort development is accomplished using a SuperFlow 600 flow bench with a computer recording all flow measurements.\n\nMany things are considered when designing a cylinder head Port\u003c\/p\u003e\u003cp\u003eair flow is only one of the things to think about. Another major concern is port wall thickness.\n\nThe porting is then preformed using a new 5 Axis CNC Cylinder Head Porting Machine with CAD\/CAM software specifically designed for cylinder head porting. CNC porting brings unparalleled accuracy to head porting with each port flowing the same. This helps balance the power that each cylinder produces, making tuning easier.\n\nNew High Strength Alloy, Heat Treated iron based valve guides are installed. These guides are heat treated to Rockwell 22 Scale, which produces the ultimate in wear resistance. This is far superior to original guide material, including Bronze. The guide incorporates a spiral grove inside the guide to hold oil and aid the lubrication of the valve during engine operation.\n\nGuides are then honed (not reamed) to exact size using a diamond honing mandrel. Diamond abrasives allow for consistency of size, surface finish, and bore geometry with no variation from guide to guide. The guide size is then verified using a valve guide bore gauge.\n\nAs needed the head receives new Premium valve seat inserts made from a true Nickel Based Non-Magnetic material that was developed for extreme operating conditions.\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\n\u003cul class=\"productpage_list\"\u003e\n\u003cli\u003ePort development is accomplished using a SuperFlow 600 flow bench with a computer recording all flow measurements.\u003c\/li\u003e\n\u003cli\u003e5 Axis CNC Cylinder Head Porting Machine with CAD\/CAM software specifically designed for cylinder head porting\u003c\/li\u003e\n\u003cli\u003eDiamond Honed Guides\u003c\/li\u003e\n\u003cli\u003eUnshrouded Valves\u003c\/li\u003e\n\u003cli\u003eHigh Strength Alloy, Heat Treated iron based valve guides\u003c\/li\u003e\n\u003cli\u003ePremium valve seat inserts made from a true Nickel Based Non-Magnetic material\u003c\/li\u003e\n\u003cli\u003eMulti angle valve job\u003c\/li\u003e\n\u003cli\u003e130LB valve springs\u003c\/li\u003e\n\u003cli\u003eSold in a pair\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Industrial Injection","offers":[{"title":"Default Title","offer_id":49856011632951,"sku":"IISPDM-LBZ\/LMMRH","price":3078.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3277\/4455\/files\/PDM-LBZLMMRH.png?v=1774034982","url":"https:\/\/apgwholesale.com\/products\/pdm-lbzlmmrh","provider":"APG Wholesale","version":"1.0","type":"link"}