{"product_id":"shs-cylinder-head-v2-v3","title":"SHS Cylinder Head — Version 2 and 3, O-Ring Sealed","description":"\u003cdiv style=\"background:#edfaf1;border-left:4px solid #27ae60;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#1a6b3a;\"\u003eSHS O-Ring Sealed Cylinder Head for Version 2 and 3 — where the nozzle seals, and where most lost air actually goes.\u003c\/strong\u003e Compression parts work as a set, never alone.\n\u003c\/div\u003e\n\u003cp\u003eThe cylinder head is the face the nozzle seals against, so a tired one leaks air the rest of the gearbox has already done the work to compress.\u003c\/p\u003e\n\u003cp\u003eLeaks here are easy to miss because nothing sounds wrong. The symptom is inconsistent readings over a chrono rather than an obvious failure, which is why it tends to get replaced last instead of first.\u003c\/p\u003e\n\u003cp\u003eFitting one is also the moment to look at the nozzle, since the two seal against each other and wear as a pair.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;margin:0 0 18px;\"\u003e\n\u003ctr style=\"background:#1B3A6B;color:#fff;\"\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCylinder head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFits\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eVersion 2 and Version 3 gearboxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSeal\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eO-ring sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSold as\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSingle cylinder head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\n\u003cp\u003eWorth changing whenever the gearbox is already open. It is cheap next to the job of getting back in there.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know the old one has gone?\u003c\/strong\u003e \u003cbr\u003eInconsistent chrono readings with no other obvious cause are the usual sign. A visibly flattened or hardened o-ring is a giveaway.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit both Version 2 and Version 3?\u003c\/strong\u003e \u003cbr\u003eYes, the manufacturer lists both. Check it seats squarely in the cylinder before closing the shell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould I change the nozzle at the same time?\u003c\/strong\u003e \u003cbr\u003eIt is worth it. The nozzle and cylinder head seal against each other, so a worn nozzle undoes a new head.\u003c\/p\u003e\n\u003cdiv style=\"background:#fffbe6;border-left:4px solid #f0d060;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n⚠ \u003cstrong\u003eSeat it squarely:\u003c\/strong\u003e a cylinder head that sits even slightly crooked will leak past the o-ring no matter how new the part is.\n\u003c\/div\u003e\n\u003cdiv style=\"background:#1B3A6B;color:#fff;padding:12px 16px;border-radius:6px;margin:18px 0 0;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#fff;\"\u003e💡 Titan Forge Airsoft tip:\u003c\/strong\u003e A smear of silicone grease on the o-ring at fitting helps it seat and stops it tearing. Browse \u003ca href=\"\/collections\/gearbox-parts\" style=\"color:#cdd6f4;\"\u003egearbox parts\u003c\/a\u003e.\n\u003c\/div\u003e","brand":"SHS","offers":[{"title":"Default Title","offer_id":53619762692472,"sku":"62381942","price":8.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/rocket-airsoft-alloy-cylinder-head-double-o-ring-ak-v3-blue-45599-p-Photoroom.jpg?v=1764255187","url":"https:\/\/www.titanforgeairsoft.com\/products\/shs-cylinder-head-v2-v3","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}