{"product_id":"boundary-billet-oil-pump-gears-b18-integra","title":"Boundary Billet Oil Pump Gears for B18C1\/B18C5","description":"\u003cul\u003e\n\u003cli\u003e18x Stronger Than OEM Gears \u003c\/li\u003e\n\u003cli\u003eMartenWear Heat Treat, Rated Past 9,000 RPM \u003c\/li\u003e\n\u003cli\u003eFits Orbit Pump Only, Commonly B18C1\/B18C5 \u003c\/li\u003e\n\u003cli\u003eBillet Steel, Made in USA, Lifetime Warranty \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eBoundary Billet Oil Pump Gears - Honda B18 (Orbit Pump Only)\u003c\/h3\u003e\n\n\u003cp\u003eIf you're building a B18 that's going to see real rpm, the oil pump gears deserve more attention than they usually get. Factory gears are sintered powdered metal at roughly 6,000 PSI of strength, and a B-series that lives at 8,000-plus rpm asks a lot more of them than a commuter ever did. These Boundary gears are billet steel approaching 110,000 PSI yield strength, cut in-house, and heat treated for operation above 9,000 RPM.\u003c\/p\u003e\n\n\u003ch4\u003eRead This First: Orbit Pump Only\u003c\/h4\u003e\n\n\u003cp\u003eMost important thing on this page. These gears fit the \u003cstrong\u003eOrbit pump only\u003c\/strong\u003e. Honda used more than one oil pump design across B-series engines, and having a B18 does not tell you which pump is bolted to yours, especially on an engine that's been swapped, rebuilt, or assembled from parts over the last thirty years.\u003c\/p\u003e\n\n\u003cp\u003eSo before you order, pull your pump or confirm what's on it. If you're not certain, reach out and we'll help you sort it out. It's a five-minute check that saves you from buying gears that won't fit a pump you've already got apart.\u003c\/p\u003e\n\n\u003ch4\u003eWhy Sintered Gears Are The Weak Link\u003c\/h4\u003e\n\n\u003cp\u003eHonda makes OEM oil pump gears by sintering, which is a cost-efficient process that produces tighter tolerances than casting. The tradeoff is strength: sintered powdered steel is actually weaker than a casting, coming in around 6,000 PSI. That's adequate for the duty cycle Honda designed for and marginal for a built B18 spinning hard on a road course or down a drag strip.\u003c\/p\u003e\n\n\u003cp\u003eBoundary starts from solid billet steel approaching 110,000 PSI yield strength, roughly 18 times stronger, and cuts every tooth themselves. They developed the specific steel grade and heat treat alongside metallurgists, and every gear traces back to its original material spec sheet through an HT number stamped on it.\u003c\/p\u003e\n\n\u003ch4\u003eMartenWear Dual-Stage Heat Treat\u003c\/h4\u003e\n\n\u003cp\u003eThese carry Boundary's MartenWear dual-stage heat treatment, rated for operation over 9,000 RPM. That matters on a B-series more than most engines, because these motors get revved. A dual-stage process gives you hard wear surfaces plus a tough core, so the gear resists wear without going brittle under the cyclic loading that high rpm creates.\u003c\/p\u003e\n\n\u003ch4\u003eTested And Backed\u003c\/h4\u003e\n\n\u003cp\u003eBoundary flow-tests every design on their own bench to 12,000 RPM before it goes out, and they hold two US patents on their pump designs. Everything is machined in the USA, and it's covered by a lifetime warranty.\u003c\/p\u003e\n\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\n\u003cp\u003eThese gears fit Honda B18 1.8L engines using the \u003cstrong\u003eOrbit pump\u003c\/strong\u003e. Confirm your pump type before ordering.\u003c\/p\u003e\n\n\u003ch4\u003eWho Should Run These Gears\u003c\/h4\u003e\n\n\u003cp\u003eThis is for the B18 builder putting an engine together properly, or anyone with a high-rpm B-series who'd rather not find out what a cracked pump gear does to a bottom end. If the pump is already off the engine, this is the moment. Confirm you're running an Orbit pump, order the right set, and build it once.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e Honda B18 1.8L with the Orbit pump only. \u003cstrong\u003ePart number:\u003c\/strong\u003e B18-OPG. \u003cstrong\u003eMaterial:\u003c\/strong\u003e billet steel, approximately 110,000 PSI yield strength versus roughly 6,000 PSI for OEM sintered gears. \u003cstrong\u003eHeat treat:\u003c\/strong\u003e MartenWear dual-stage, rated for operation over 9,000 RPM. \u003cstrong\u003eTesting:\u003c\/strong\u003e flow-tested to 12,000 RPM. \u003cstrong\u003eWarranty:\u003c\/strong\u003e lifetime. \u003cstrong\u003eMade in the USA.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e1994-2001 Acura Integra GS-R\u003cbr\u003e1997-2001 Acura Integra Type R\u003cbr\u003e\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Boundary Racing Pumps","offers":[{"title":"Default Title","offer_id":46384868392994,"sku":"BND-B18-OPG-M","price":399.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/BND-B18-OPG-M_crb5.jpg?v=1786464509","url":"https:\/\/www.hybrid-racing.com\/products\/boundary-billet-oil-pump-gears-b18-integra","provider":"Hybrid Racing","version":"1.0","type":"link"}