{"product_id":"fel-pro-valve-cover-gasket-set-1635-permadry-silicone-for-big-block-chevy-396-502","title":"Fel-Pro Valve Cover Gasket Set 1635 — PermaDry Silicone for Big-Block Chevy 396–502","description":"\u003cp\u003e\u003cstrong\u003eFel-Pro 1635 is a PermaDry molded silicone valve cover gasket set engineered to seal big-block V8 cylinder heads reliably during high-stress use.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis Fel-Pro valve cover gasket set is built for performance engines where durability and a secure seal matter. Designed for GMP Performance big-block Chevrolet V8s — including 396, 402, 427, 454 and 502 cubic-inch displacements — the kit uses molded silicone rubber over a rigid steel core with stainless compression limiters to resist blowouts, re-sealing needs, and distortion under heat and vibration. The gaskets are suited to repeated removal and reinstallation, making them practical for engine tuning, maintenance, and racing applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this gasket set stand up to high-heat, high-vibration conditions?\u003c\/h3\u003e\n\n\u003cp\u003eThe Fel-Pro PermaDry silicone material tolerates elevated engine bay temperatures while maintaining a flexible, leak-resistant seal. A solid steel core prevents gasket collapse and helps preserve shape, even after multiple heat cycles. Stainless compression limiters distribute clamp load and reduce risk of over-compression at bolt locations.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMolded silicone resists heat and hardening compared with standard rubber.\u003c\/li\u003e\n  \u003cli\u003eRigid steel core maintains gasket geometry during reinstallation.\u003c\/li\u003e\n  \u003cli\u003eStainless steel limiters protect against bolt over-torque and sealing failure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat engines and vehicles does the FEL-PRO 1635 fit?\u003c\/h3\u003e\n\n\u003cp\u003eThis set is made for GMP Performance big-block Chevy engines: 396 (6.5L), 402 (6.6L), 427 (7.0L), 454 (7.4L), and 502 (8.2L). It is intended for use on non-emission-controlled engines and period or performance builds rather than modern emission-sensitive applications.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with GMP Performance V8 big-block families listed above.\u003c\/li\u003e\n  \u003cli\u003eBest for race, restoration, and aftermarket high-displacement builds.\u003c\/li\u003e\n  \u003cli\u003eNot designed for emission-controlled vehicles—check local regulations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and maintenance with this gasket set?\u003c\/h3\u003e\n\n\u003cp\u003eThe molded silicone over a rigid core makes the gasket easier to position during installation and reinstallation after valve adjustments. Its construction helps the gasket resist tearing and keeps the sealing bead in place, reducing the need for sealants. Still, confirm fitment before purchase and follow torque specs during assembly.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePermaDry molded silicone holds shape for straightforward placement.\u003c\/li\u003e\n  \u003cli\u003eDesigned for on-again\/off-again service like valve-lash checks.\u003c\/li\u003e\n  \u003cli\u003eCheck vehicle fitment notes and torque specifications prior to installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose Fel-Pro Performance gaskets for a racing or high-performance build?\u003c\/h3\u003e\n\n\u003cp\u003eFel-Pro Performance gaskets prioritize reliable sealing under demanding conditions. The combination of silicone sealing material, a reinforced steel core, and stainless limiters reduces common failure modes—hardening, gasket creep, and bolt over-compression—so your engine stays cleaner and maintains oil control during spirited use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eEngineered for endurance under racing and heavy-duty applications.\u003c\/li\u003e\n  \u003cli\u003eMaterials chosen to limit common failure points in high-stress engines.\u003c\/li\u003e\n  \u003cli\u003eAllows routine engine servicing without immediate replacement after removal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The FEL-PRO 1635 valve cover gasket set is aimed at owners, mechanics, and racers working with GMP Performance big-block Chevy engines who need a durable, serviceable seal. It's a practical choice for restorations, performance upgrades, and engines used in track or tough driving conditions, provided the vehicle is not subject to emission-control restrictions. Before buying, verify fitment with exact engine and vehicle data to ensure compatibility.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this gasket fit my 454 big-block Chevy?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the FEL-PRO 1635 is specified for 454 (7.4L) GMP Performance big-block Chevy engines; confirm exact engine and head configuration before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need additional sealant when installing these gaskets?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Generally no—PermaDry molded silicone is designed to seal without extra sealant; follow Fel-Pro torque specs and installation notes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Fel-Pro","offers":[{"title":"Default Title","offer_id":48084035600542,"sku":"B000CMIQBG","price":85.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/fel-pro-1635-front-packaging.jpg?v=1785844337","url":"https:\/\/northtrailauto.ca\/products\/fel-pro-valve-cover-gasket-set-1635-permadry-silicone-for-big-block-chevy-396-502","provider":"North Trail Auto","version":"1.0","type":"link"}