{"product_id":"tomei-head-gasket-4ag-16v-82-5-1-0mm","title":"Tomei HEAD GASKET 4AG 16V 82.5-1.0mm","description":"\u003ch2\u003ePRODUCT INFO\u003c\/h2\u003e\n\u003cdiv class=\"table-box\"\u003e\n\u003ctable style=\"width: 100.089%; height: 137.157px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth colspan=\"2\" style=\"width: 15.8335%; height: 19.5938px;\"\u003eAPPLICATION\u003c\/th\u003e\n\u003cth style=\"width: 6.92281%; height: 19.5938px;\"\u003eBORE\u003c\/th\u003e\n\u003cth style=\"width: 14.5894%; height: 19.5938px;\"\u003eTHICKNESS\u003c\/th\u003e\n\u003cth style=\"width: 14.3433%; height: 19.5938px;\"\u003eP\/N\u003c\/th\u003e\n\u003cth style=\"width: 10.5483%; height: 19.5938px;\"\u003e\u003c\/th\u003e\n\u003cth style=\"width: 12.7043%; height: 19.5938px;\"\u003eMATERIAL\u003c\/th\u003e\n\u003cth style=\"width: 15.7167%; height: 19.5938px;\"\u003eSTRUCTURE\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd rowspan=\"6\" style=\"width: 9.79482%; height: 117.563px;\"\u003e4A-GE\u003c\/td\u003e\n\u003ctd rowspan=\"3\" style=\"width: 6.0387%; height: 58.7814px;\"\u003e16V\u003c\/td\u003e\n\u003ctd rowspan=\"3\" style=\"width: 6.92281%; height: 58.7814px;\"\u003eφ82.5\u003c\/td\u003e\n\u003ctd style=\"width: 14.5894%; height: 19.5938px;\"\u003e0.8mm\u003c\/td\u003e\n\u003ctd style=\"width: 14.3433%; height: 19.5938px;\"\u003e1373825081\u003c\/td\u003e\n\u003ctd rowspan=\"6\" style=\"width: 10.5483%; height: 117.563px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd rowspan=\"6\" style=\"width: 12.7043%; height: 117.563px;\"\u003eMetal\u003c\/td\u003e\n\u003ctd rowspan=\"3\" style=\"width: 15.7167%; height: 58.7814px;\"\u003eOpposing Bead Type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 14.5894%; height: 19.5938px;\"\u003e1.0mm\u003c\/td\u003e\n\u003ctd style=\"width: 14.3433%; height: 19.5938px;\"\u003e1373825101\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 14.5894%; height: 19.5938px;\"\u003e1.2mm\u003c\/td\u003e\n\u003ctd style=\"width: 14.3433%; height: 19.5938px;\"\u003e1373825121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd rowspan=\"3\" style=\"width: 6.0387%; height: 58.7814px;\"\u003e20V\u003c\/td\u003e\n\u003ctd rowspan=\"3\" style=\"width: 6.92281%; height: 58.7814px;\"\u003eφ82.5\u003c\/td\u003e\n\u003ctd style=\"width: 14.5894%; height: 19.5938px;\"\u003e0.8mm\u003c\/td\u003e\n\u003ctd style=\"width: 14.3433%; height: 19.5938px;\"\u003e1374825081\u003c\/td\u003e\n\u003ctd rowspan=\"3\" style=\"width: 15.7167%; height: 58.7814px;\"\u003eBead Type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 14.5894%; height: 19.5938px;\"\u003e1.0mm\u003c\/td\u003e\n\u003ctd style=\"width: 14.3433%; height: 19.5938px;\"\u003e1374825101\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 14.5894%; height: 19.5938px;\"\u003e1.2mm\u003c\/td\u003e\n\u003ctd style=\"width: 14.3433%; height: 19.5938px;\"\u003e1374825121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFEATURE \/ SPEC\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan class=\"en\"\u003e■ Gasket structure corresponding to 16V\/20V respectively\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan class=\"en\"\u003eFor the 4AG engine, two types of head gasket structures are available depending on the model.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"table-box\"\u003e\n\u003ctable class=\"noboder\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"150\"\u003e\u003cimg src=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2023\/09\/bead_anomal.jpg\" alt=\"\" width=\"150\" height=\"190\" class=\"aligncenter size-full wp-image-11445\"\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"en\"\u003eOpposing Bead Type\u003c\/span\u003e\u003c\/strong\u003e\u003chr\u003e\n\u003cspan class=\"en\"\u003eKeeps the surface pressure evenly around the bores, water lines and oil lines.\u003cbr\u003eDesigned to withstand and long-last on modified Nissan-A engines typically run at high RPM and high load conditions.\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-box\"\u003e\n\u003ctable class=\"noboder\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"150\"\u003e\u003cimg src=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2025\/11\/bead_2.jpg\" alt=\"\" width=\"150\" height=\"190\" class=\"aligncenter size-full wp-image-11446\"\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"en\"\u003eBEAD TYPE\u003c\/span\u003e\u003c\/strong\u003e\u003chr\u003e\n\u003cspan class=\"en\"\u003eThe bore circumference, coolant and oil seals are all sealed well with the bead confifuration.\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"en\"\u003e■ Heat Conductivity \u0026amp; The Strength of Stainless Steel\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan class=\"en\"\u003eStainless steel was chosen to be the material of choice to make the Metal Gaskets with because of the heat conductivity efficiency of the stainless steel material to evenly distribute the heat and aid with cooling. This will greatly improve reliability and reduce the chances of problems.\u003cbr\u003eThe natural high tensile qualities of Stainless Steel greatly helps with increasing the joint ridged of the cylinder head with the cylinder block. This helps minimize the engine from warping when under severe stress loads that performance engines go through when running high power applications. The result is improved durability and added power gains.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"en\"\u003e■ HIGH SEALING PERFORMANCE\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan class=\"en\"\u003eOptimum design of the bead line securely seals the water and oil lines.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2025\/11\/4ag_rib.jpg\" alt=\"\" width=\"1100\" height=\"288\" class=\"aligncenter size-full wp-image-13171\" srcset=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2025\/11\/4ag_rib.jpg 1100w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2025\/11\/4ag_rib-300x79.jpg 300w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2025\/11\/4ag_rib-768x201.jpg 768w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2025\/11\/4ag_rib-1024x268.jpg 1024w\" sizes=\"(max-width: 1100px) 100vw, 1100px\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"en\"\u003e■ ABOUT MARKING\u003c\/span\u003e\u003c\/h3\u003e\n\u003cdiv class=\"table-box\"\u003e\n\u003ctable class=\"noboder\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eAll our metal head gaskets are laser marked with Models, Bores, Thickness, and TOMEI POWERED INC. company name.\u003cbr\u003eSince there are similar\/counterfeit goods on market, please make sure logos on Gasket.\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"280\"\u003e\u003cimg src=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2025\/11\/4ag.jpg\" alt=\"\" width=\"280\" height=\"187\" class=\"aligncenter size-full wp-image-2396\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"kaihei-header x\"\u003e\u003cspan class=\"en\"\u003eSample Compression Ratio\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"kaihei-body\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"table-box\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003e\u003cspan class=\"en\"\u003eGASKET\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003eAE86\u003c\/th\u003e\n\u003cth\u003eAE92\u003c\/th\u003e\n\u003cth\u003eAE101\u003c\/th\u003e\n\u003cth\u003eAE111\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eSTOCK\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003eφ82.0\u003c\/th\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.9.4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.3\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.5\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.11.0\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth rowspan=\"3\"\u003eTOMEI\u003c\/th\u003e\n\u003cth\u003eφ82.0-0.8mm\u003c\/th\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.9.8\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.8\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.11.0\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.11.0\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eφ82.0-1.0mm\u003c\/th\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.9.6\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.6\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.7\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.7\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eφ82.0-1.2mm\u003c\/th\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.9.4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.3\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.5\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eApprox.10.5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\u003cspan class=\"en\"\u003eValues of the sample compression ratios are calculated out based on the factory spec data.\u003cbr\u003eAdjustment of the compression ratio must be based on the measurement of the actual engine.\u003c\/span\u003e\n\u003c\/div\u003e","brand":"TOMEI UK","offers":[{"title":"Default Title","offer_id":56248795464057,"sku":"1373825101","price":179.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3531\/0639\/files\/1373825081.jpg?v=1763731376","url":"https:\/\/tomei.uk\/products\/tomei-head-gasket-4ag-16v-82-5-1-0mm","provider":"TOMEI UK","version":"1.0","type":"link"}