{"product_id":"dfc-diesel-ss5998599soalb-street-series-speed-of-air-long-block-std-auto-1998-5-1999-dodge-ram-5-9l-cummins-24v","title":"DFC Diesel SS5998599SOALB Street Series Speed of Air Long Block (STD\/Auto) | 1998.5-1999 Dodge RAM 5.9L Cummins 24V","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 1998.5–1999 Dodge Ram 5.9L 24V Cummins\u003c\/li\u003e\n\u003cli\u003eEquipped with Speed of Air Hyperformance pistons\u003c\/li\u003e\n\u003cli\u003eIncreases fuel economy by up to 25%\u003c\/li\u003e\n\u003cli\u003eLowers oil change intervals by up to 50%\u003c\/li\u003e\n\u003cli\u003eReduces EGTs by 100–200 degrees\u003c\/li\u003e\n\u003cli\u003eDecreases visible soot and exhaust opacity\u003c\/li\u003e\n\u003cli\u003eImproves throttle response and low-end torque\u003c\/li\u003e\n\u003cli\u003eBuilt to handle added horsepower reliably\u003c\/li\u003e\n\u003cli\u003eMachined using Rottler equipment for tight tolerances\u003c\/li\u003e\n\u003cli\u003eIncludes cylinder head, gaskets, rockers, pushrods\u003c\/li\u003e\n\u003cli\u003eBacked by 5-year, 100,000-mile warranty\u003c\/li\u003e\n\u003cli\u003eProudly remanufactured in North America\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBuilt for More Than Just a Rebuild\u003c\/h4\u003e\n\u003cp\u003eIf you're chasing a reliable, high-performance replacement for your 1998.5–1999 Dodge Ram 5.9L Cummins 24V, the DFC Diesel SS5998599SOALB Street Series Long Block might just be the last engine your truck ever needs. Designed for standard or automatic transmissions, this remanufactured long block isn't just about getting you back on the road—it’s built to deliver cleaner combustion, longer life, and more efficient performance right from the first turn of the key. What sets it apart is DFC’s collaboration with Speed of Air, incorporating their patented Hyperformance pistons. These pistons feature precisely machined “turbulators” and aerospace-grade coatings that help the combustion burn cleaner, reduce friction, and retain more heat inside the chamber—translating to improved torque, quicker turbo response, and noticeably smoother drivability. For drivers who tow, daily, or just want to feel more power under their right foot, this means faster spool-up, better low-end torque, and more confidence when climbing grades or overtaking with a trailer in tow.\u003c\/p\u003e\n\u003ch4\u003eBuilt to Perform, Engineered to Last\u003c\/h4\u003e\n\u003cp\u003eDFC doesn’t just freshen up tired engines—they tear them down, throw out anything questionable, and rebuild using only the best cores and name-brand components that meet or exceed OEM specs. The result is an engine machined with tighter-than-factory tolerances thanks to advanced Rottler equipment, designed to deliver better performance and greater longevity than what rolled off the assembly line. Each long block includes a professionally assembled short block, cylinder head, complete top-end gasket kit, and factory-spec rockers and pushrods, all preset for a hassle-free install. And the real-world results don’t disappoint: drivers report 15–25% better fuel economy, reduced oil change intervals, fewer regen cycles, and exhaust temps dropping by up to 200 degrees. Backed by DFC’s 5-year, 100,000-mile warranty, this long block isn’t just a replacement—it’s a serious upgrade built for trucks that work hard and demand reliability day in and day out.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 1998.5, 1999 Dodge Ram 5.9L Cummins 24V\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Image Note:\u003c\/strong\u003e Some images may be representative.\u003c\/p\u003e","brand":"DFC Diesel","offers":[{"title":"Default Title","offer_id":68060707488017,"sku":"DDU-SS5998599SOALB","price":11171.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/0477\/1089\/files\/DDUSS5998599SOALB_1.jpg?v=1794721874","url":"https:\/\/gautoparts.com\/products\/dfc-diesel-ss5998599soalb-street-series-speed-of-air-long-block-std-auto-1998-5-1999-dodge-ram-5-9l-cummins-24v","provider":"Guaranteed Auto Parts","version":"1.0","type":"link"}