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Engine: Mopar 426 “Hellephant” crate engine. Mopar ECU, VaporWorx fuel pump controller.
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Trans-axle: Tremec TR-6070 7-speed manual trans-axle. Tilton Engineering ST-246 twin-disk clutch and flywheel. Custom carbon fiber driveshaft and custom CV axles.
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Front Suspension: Custom double wishbone with QA1 coilovers. Wilwood 6 piston mono-block brakes.
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Rear Suspension: Custom double wishbone with QA1 coilovers. Wilwood 4 piston mono-block brakes.
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Wheels: Custom made by Schott wheels, based on original hubcaps. 18x8 front and 19x12.5 rear.
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Interior: One-off design by Mike Miernik and brought to fruition by Stitch Craft Upholstry. Made from aluminum and carbon fiber composite panels, modified Porsche 911 seats, and hand-made stainless details throughout.
Check out this short video for a Closer Look!
The Rumble Bird is a 1969 Plymouth Roadrunner reimagined to deliver modern supercar performance while maintaining its classic, understated appearance. Powered by a 1000HP “Hellephant” 426 HEMI, this one-of-a-kind pro-touring machine features a Tremec 7-speed manual Transaxle and a custom Torque Chassis designed, engineered, and fabricated entirely in-house by Eckerts Rod and Custom. The purpose-built chassis transforms the original unibody into a rigid body-on-frame platform with independent double-wishbone suspension, QA1 coilovers, and Wilwood brakes at all four corners.
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Subtle modifications include extended rocker panels, hand formed, bumpers, and massive rear tires on custom wheels designed to replicate the original hub caps are tucked underneath the factory-style quarter panels. Inside, a bespoke interior combines aluminum and carbon fiber panels, modified Porsche 911 seats, and handcrafted stainless-steel details. Modern conveniences include air-conditioning, power windows, central locking and LED lighting.
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The Rumble Bird represents the perfect balance of classic Mopar heritage, modern engineering, and uncompromising craftsmanship.​