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The top of the line model in 1999 was a limited edition (220 were made and had stickers on the dash that say Callaway and have the number) 4.6 HSE modified by Callaway in Old Lyme, Connecticut. They were available in Niagara Gray, Epsom Green, or Rutland Red. They had much of the black plastic painted body color and special dual exhaust system.
The high performance Callaway engine with 240 bhp at 5,000 RPM and peak torque of 285 lb-ft at 3,500 RPM improved the 4.6 HSE acceleration 0-60 mph from 9.7 seconds to 8.6 seconds. The Callaway 4.6 HSE sold for $75,000.
The 'short block' of the engine is the same as other Land Rover 4.6 HSE models. Short-blocks used for the 4.6L Callaway engines were stamped with a 9.60:1 compression ratio marking from Land Rover. The increase of 0.25 points, up from the standard 4.6L compression ratio of 9.35:1 was achieved by a modification to the cylinder heads. The cylinder heads were also modified to improve the airflow into and out of the combustion chambers. The inlet manifold gaskets front valley clamp has been changed to accommodate the heater hose positioning on the bottom front of the Callaway manifold. The ram pipe housing has been modified by shortening the ram pipe tube lengths. The intake runner lengths were tuned to increase both power and torque. The black plastic air inlet tube was replaced with a larger diameter fancy looking carbon fiber inlet tube to match the larger throttle bore in the plenum. The air cleaner box base was modified to increase the airflow. The Lucas GEMS ECU was calibrated to support the mechanical changes to the Callaway engine.
The Callaway drivetrain was also modified. The automatic transmission used in the Callaway 4.6 HSE Range has a different torque converter and the transmission control unit (TCU) has been re-calibrated to take advantage of the increased torque and power of the engine. The shift points in both 'NORMAL' and 'SPORT' modes have been changed to match the engine's increased power.
The electronic shift transfer case has a new ratio sprocket set and chain. The resulting new ratios provide a high range ratio of 1.294:1, and a low range ratio of 3.481:1. The ratio change improves acceleration performance in high range while also providing improved off-road 'crawl' performance and coast down rates in low range.
The front axle shafts used on the Callaway 4.6 HSE have been strengthened to withstand the increased torque to the front wheels from the engine and transmission changes. A material change in the axles ensures durability will be maintained from the front axle half shafts. Callaway decided to use a four-pin front differential to accommodate the increased torque rather than the two-pin front diff used on standard production Range Rovers.
The Callaway dual exhaust had reduced backpressure and was similar to the dual exhaust that all NAS Range Rovers got in the 2000 model year. Changes to the exhaust system were made rearward of the catalyst 'Y' pipe. The exhaust system backpressure was reduced by 43 percent, and the interior sound level in the passenger cabin was virtually unchanged. The center silencer provides reduced backpressure and is constructed from stainless steel. A twin tail pipe system was selected to provide a performance look and sound. The straight exit twin outlets are accented by T-304 stainless steel resonator tips to visually differentiate the Callaway 4.6 HSE from other Range Rovers. The pipes are welded on the stock mufflers and the rear bumpers have cut outs for the tailpipes.
The exterior of the Callaway 4.6 HSE Range Rover has painted body color components. The exterior components painted to match the body car, the Entire Front Bumper Cover, the Front Grill, Left and Right Headlamp trim, Left and Right Door Mirror Casings, Rear Bumper including area with Exhaust Tip Openings.
All Callaway Range Rovers came with the 'Proline' 18-inch 5-spoke alloy wheels.
The high performance Callaway engine with 240 bhp at 5,000 RPM and peak torque of 285 lb-ft at 3,500 RPM improved the 4.6 HSE acceleration 0-60 mph from 9.7 seconds to 8.6 seconds. The Callaway 4.6 HSE sold for $75,000.
The 'short block' of the engine is the same as other Land Rover 4.6 HSE models. Short-blocks used for the 4.6L Callaway engines were stamped with a 9.60:1 compression ratio marking from Land Rover. The increase of 0.25 points, up from the standard 4.6L compression ratio of 9.35:1 was achieved by a modification to the cylinder heads. The cylinder heads were also modified to improve the airflow into and out of the combustion chambers. The inlet manifold gaskets front valley clamp has been changed to accommodate the heater hose positioning on the bottom front of the Callaway manifold. The ram pipe housing has been modified by shortening the ram pipe tube lengths. The intake runner lengths were tuned to increase both power and torque. The black plastic air inlet tube was replaced with a larger diameter fancy looking carbon fiber inlet tube to match the larger throttle bore in the plenum. The air cleaner box base was modified to increase the airflow. The Lucas GEMS ECU was calibrated to support the mechanical changes to the Callaway engine.
The Callaway drivetrain was also modified. The automatic transmission used in the Callaway 4.6 HSE Range has a different torque converter and the transmission control unit (TCU) has been re-calibrated to take advantage of the increased torque and power of the engine. The shift points in both 'NORMAL' and 'SPORT' modes have been changed to match the engine's increased power.
The electronic shift transfer case has a new ratio sprocket set and chain. The resulting new ratios provide a high range ratio of 1.294:1, and a low range ratio of 3.481:1. The ratio change improves acceleration performance in high range while also providing improved off-road 'crawl' performance and coast down rates in low range.
The front axle shafts used on the Callaway 4.6 HSE have been strengthened to withstand the increased torque to the front wheels from the engine and transmission changes. A material change in the axles ensures durability will be maintained from the front axle half shafts. Callaway decided to use a four-pin front differential to accommodate the increased torque rather than the two-pin front diff used on standard production Range Rovers.
The Callaway dual exhaust had reduced backpressure and was similar to the dual exhaust that all NAS Range Rovers got in the 2000 model year. Changes to the exhaust system were made rearward of the catalyst 'Y' pipe. The exhaust system backpressure was reduced by 43 percent, and the interior sound level in the passenger cabin was virtually unchanged. The center silencer provides reduced backpressure and is constructed from stainless steel. A twin tail pipe system was selected to provide a performance look and sound. The straight exit twin outlets are accented by T-304 stainless steel resonator tips to visually differentiate the Callaway 4.6 HSE from other Range Rovers. The pipes are welded on the stock mufflers and the rear bumpers have cut outs for the tailpipes.
The exterior of the Callaway 4.6 HSE Range Rover has painted body color components. The exterior components painted to match the body car, the Entire Front Bumper Cover, the Front Grill, Left and Right Headlamp trim, Left and Right Door Mirror Casings, Rear Bumper including area with Exhaust Tip Openings.
All Callaway Range Rovers came with the 'Proline' 18-inch 5-spoke alloy wheels.
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Recent Sales of the Land Rover Range Rover 4.6 HSE
(Data based on Model Year 1999 sales)
Land Rover Range Rover 4.6 HSEs That Failed To Sell At Auction
1999 Callaway Range Rover 4.6 HSE's that have appeared at auction but did not sell.
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1999 Callaway Range Rover 4.6 HSE
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