{"product_id":"rcm-cylinder-4-cooling-mod-kit-street-spec","title":"RCM Cylinder 4 Cooling Mod Kit - Street Spec","description":"\u003cp\u003eCylinder four runs hotter than the other three on Subaru's EJ engines. It is a design consequence, not a fault: the routing of the water passageways at the back of the block leaves coolant flow weakest around that cylinder, and on a tuned engine that is exactly where the extra heat is least welcome.\u003c\/p\u003e\n\n\u003cp\u003eThe Street Spec kit is RCM's budget answer to it. There is an unused port at the back of the block at cylinder four's location; the kit feeds that port and tees it into the water matrix pipe directly above, adding flow where the factory design left it short.\u003c\/p\u003e\n\n\u003ch2\u003eWhat is in this kit\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet fittings\u003c\/strong\u003e fixed onto quality coolant hose.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGenuine Subaru water hose clamps.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTee piece with fittings\u003c\/strong\u003e for the connection into the water matrix pipe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo supplied pipe lengths\u003c\/strong\u003e, so you can set the position and bend correctly for your car.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe billet barb is sized deliberately. Its internal diameter sets the flow rate around cylinder four high enough to cool it and no higher — the point is to even the engine out, not to overcool one cylinder.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitting note from RCM:\u003c\/strong\u003e the position of the metal water pipe the kit attaches to varies slightly between vehicles. Trim the supplied pipe if needed so the hose does not kink.\u003c\/p\u003e\n\n\u003ch2\u003eStreet Spec or the full kit?\u003c\/h2\u003e\n\n\u003cp\u003eThis kit uses quality coolant hose, Subaru clamps and pipe you cut to length. The \u003ca href=\"\/products\/rcm-cylinder-4-cooling-mod-kit\"\u003efull kit\u003c\/a\u003e uses a pre-formed 90-degree Samco silicone hose with the billet fittings banded in place and stainless HiGrip fittings, so there is nothing to trim and no risk of a kink. Same barb sizing and same principle either way — the difference is hose quality, fittings and how much of the fitting work you do.\u003c\/p\u003e\n\n\u003ch2\u003eFitting\u003c\/h2\u003e\n\n\u003cp\u003eNo machining and no modification to the block — the port it uses is already there and unused from the factory. We fit these as part of engine builds at \u003ca href=\"\/pages\/our-shop\"\u003eour Red Deer shop\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eNot sure whether your engine has the port, or which kit suits your build? Send us the engine and we will confirm before you order. More RCM parts in our \u003ca href=\"\/collections\/roger-clark-motorsport-rcm\"\u003eRoger Clark Motorsport range\u003c\/a\u003e.\u003c\/p\u003e","brand":"Roger Clark Motorsport","offers":[{"title":"Default Title","offer_id":42844154724505,"sku":"RCM3307","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0107\/1779\/0308\/products\/rcm3307.jpg?v=1669840566","url":"https:\/\/www.afrautoworksstore.com\/products\/rcm-cylinder-4-cooling-mod-kit-street-spec","provider":"AFR Autoworks","version":"1.0","type":"link"}