BMR SPD110R Demon Killer Drag Springs Set of 4 Red 2006-2023 Charger Challenger

Vehicle Fitment

• 2008-2023 Dodge Challenger (All Trims: SXT, GT, R/T, Scat Pack, Scat Pack Widebody, Hellcat, Hellcat Redeye, Hellcat Redeye Widebody, Super Stock, Demon - All engines - RWD)
• 2006-2023 Dodge Charger (All Trims: SE, SXT, R/T, Scat Pack, Daytona, Hellcat, Hellcat Redeye, Super Bee, SRT8 - All engines - RWD)

Fitment Notes

• Factory height springs - the SPD110R does NOT lower ride height; it replaces the factory springs with drag-optimized springs at the same ride height; this is not a lowering spring kit and should not be ordered by builders seeking a drop in ride height
• Designed primarily for forced-induction Hellcat, Redeye, and Demon variants - BMR engineered the SPD110R spring rates around the weight distribution of supercharged 6.2L Charger/Challenger builds, where the heavy front-mounted supercharger significantly loads the front axle; the spring rates also benefit 6.4L Scat Pack builds
• Fits all trims and all engine configurations on both platforms - the full-vehicle spring replacement (all four corners) applies to any 2008-2023 Challenger or 2006-2023 Charger regardless of trim
• Sold as a complete set of 4 springs (all four corners, front and rear)
• A wheel alignment is recommended after installation; even at factory ride height, spring changes can affect alignment slightly due to differences in spring preload and seat geometry
• Estimated installation time: 3-4 hours

Features

• Maintains factory ride height - the SPD110R replaces all four factory springs with drag-optimized units at the same installed height, allowing the vehicle to retain its OEM appearance and clearance while gaining all the launch performance benefits of purpose-engineered drag spring rates
• 212 lb/in front spring rate (linear) - tuned specifically for drag racing applications on the Hellcat/Demon platform; the front spring rate is calibrated to allow controlled front-end rise under hard acceleration, managing the front-to-rear weight transfer that plants the rear tires without letting the front end become unmanageable
• 570 lb/in rear spring rate (linear) - a high rear spring rate that resists rear squat under the massive torque loads of supercharged launch events; reducing rear squat keeps the rear suspension geometry in a more consistent position during the launch, improving traction consistency and reducing the wheel hop and body oscillation that limit 60-foot times
• Linear spring rate at both ends provides consistent, predictable handling response throughout the full range of suspension travel - no progressive-rate inflection points that can cause inconsistent launch behavior when the suspension loads change
• Manufactured from chrome silicon high-tensile spring wire - the premium spring steel alloy offering superior tensile strength, fatigue resistance, and long-term rate retention
• Cold-wound on a CNC coiling machine with real-time diameter adjustment - every spring is dimensionally and geometrically identical; left and right springs are perfectly matched
• Compressed solid twice at the factory - permanently sets each spring's natural length and eliminates any rate variation or sag that would otherwise occur in the spring's first compression cycles
• Stress-relieved at 750°F - eliminates winding-induced internal stresses to improve spring fatigue life and rate consistency over the product's service life
• Shot-peened - removes residual surface stresses that can initiate fatigue cracks under repeated high-cycle loading
• Computer-tested individually - every spring is loaded on a CNC load cell spring tester before shipment; BMR does not batch-sample; every spring's rate and height are verified
• Lifetime warranty against spring sag - the full manufacturing process eliminates every known source of rate loss and allows BMR to guarantee no sag for the life of the springs
• Red powdercoat finish provides a bold, high-visibility appearance with durable corrosion resistance
• Designed and manufactured in the USA by BMR Suspension

Specifications

• Part Number: SPD110R
• Finish: Red powdercoat
• Drop: None - factory ride height maintained
• Front Spring Rate: 212 lb/in (linear)
• Rear Spring Rate: 570 lb/in (linear)
• Material: Chrome silicon high-tensile spring wire
• Manufacturing: CNC cold-wound, compressed solid twice, stress-relieved at 750°F, shot-peened, computer-tested individually
• Quantity: Set of 4 (all four corners)
• Estimated Install Time: 3-4 hours
• Warranty: Lifetime against spring sag
• Country of Origin: USA

Included Components

• 2x BMR SPD110R Front Drag Springs (left and right, red powdercoat, 212 lb/in)
• 2x BMR SPD110R Rear Drag Springs (left and right, red powdercoat, 570 lb/in)

Product Description

The BMR Suspension SPD110R is the "Demon Killer" drag spring kit - a complete set of four factory-height drag racing springs engineered for the 2008-2023 Dodge Challenger and 2006-2023 Dodge Charger, with spring rates developed specifically around the weight distribution and launch dynamics of supercharged Hellcat, Redeye, and Demon variants. Unlike conventional lowering springs, the SPD110R makes no change to ride height - it replaces all four factory springs with purpose-built drag springs at the same installed height, preserving the vehicle's factory appearance and ground clearance while completely transforming its ability to transfer weight and manage rear squat under hard launches.

The core engineering insight behind the SPD110R is the asymmetric spring rate calibration: a 212 lb/in front rate manages the controlled front-end lift that is essential to rear weight transfer during a drag launch, while the 570 lb/in rear rate resists the rear squat that would otherwise allow the rear suspension to collapse under the violent torque loads of a supercharged launch - keeping the rear geometry more consistent through the launch and improving both traction and 60-foot consistency. On a stock-sprung Hellcat or Demon, the factory rear springs are too soft to resist this squat effectively, and the resulting rear compression/extension cycle under power contributes directly to wheelhop, erratic launch behavior, and inconsistent elapsed times. The SPD110R addresses this at the source. Every spring is manufactured from chrome silicon high-tensile wire, wound on a CNC coiling machine, double cold-set, stress-relieved at 750°F, shot-peened, and individually computer-tested - and backed by BMR's lifetime warranty against spring sag. Made in the USA by BMR Suspension.