1958 Pontiac Bonneville Sport Coupe

Description

Pontiac was rapidly becoming General Motors’ performance division by 1958, and Bonneville was Pontiac’s limited-production image-changer in hardtop coupe and convertible versions. Standard power was a new 370 cu-in V8, and “Tri-Power” with three two-barrel Rochester carburetors a popular option. Rochester mechanical fuel injection like the Corvette’s was an extravagant $580 option with 10 more horsepower, as was “Ever Level” air spring suspension, supposedly Detroit’s next big thing. Most buyers — and Hot Rod magazine — preferred the Tri-Power and coil spring versions, with the publication exclaiming, “Our test Bonneville ran the speedometer needle right out of sight and kept accelerating the one time we tried it for a short stretch out on the Nevada desert.”

This 1958 Pontiac Bonneville Sport Coupe, finished in very mid-century “Calypso Green” with “Patina Ivory” inset, is powered by the Tri-Power 370, and was also equipped with “Ever Level” Air Ride suspension, all as from the factory. Most air spring cars from 1958 have the troublesome systems replaced with coil springs, but this Bonneville has been upgraded with a reliable Air Ride Technologies air spring package with a modern control system and twin redundant electric compressors (the rare complete OEM “Ever Level” components are included). With a thorough and meticulous restoration using many original and OEM components, and an air spring suspension functioning as GM intended, this California-built Bonneville Sport Coupe represents the absolute pinnacle of Pontiac panache and performance in 1958.

Highlights

• Highly original example of Pontiac’s limited-production premium performance machine for 1958

• 9,144 Bonneville Sport Coupes produced

• Winner of over 40 awards (not included in sale)

• Original “Ever Level” Air Ride option upgraded with modern, reliable Air Ride Technologies RidePRO e3 air suspension

• “Tri-Power” 370 cu-in V8 with three two-barrel Rochester carbs producing 300 horsepower

• “Strato-Flight” Hydra-Matic four-speed automatic transmission

• Finished in Calypso Green with Patina Ivory inset

• Complementing Two-Tone Green vinyl interior

• The chassis number (C558H2127) decodes as:

  • C – South Gate, California, final assembly plant

  • 5 – Series 25, Bonneville

  • 58 – 1958 model year

  • H – Hydra-Matic transmission

  • 2127 – Production serial number

• The Body by Fisher tag decodes as:

  • Style 58-2547SD – 1958 Bonneville Sport Coupe

  • Body No: BC 855 – South Gate, California, plant body serial number

  • Trim: 268 – Two-Tone Green

  • Paint: TTV ­– Calypso Green body and top with Patina Ivory inset

  • Acc.: PX-V – Tri-Power Carburetion, “Ever Level” Air Ride

Features

• This 1958 Pontiac Bonneville has been maintained and restored with the following:

  • Engine and transmission professionally rebuilt

  • Upgraded Petronix ignition system and new spark plugs

  • Brake system completely rebuilt October 2023 with turned drums and new wheel cylinders, hoses, shoes, brake fluid, springs, and seals

  • New front suspension tie rod ends, ball joints, and bushings

  • New shock absorbers, wheel bearings, seals, and U-joints

  • Custom rear suspension brackets for Ride Tech air bags

  • Rebuilt vacuum wiper motor

  • The exhaust system replaced with aluminized steel

  • Upholstery material and carpet sourced from SMS Auto Fabrics

• Delco Super Deluxe radio

• Power steering

• Vacuum-assisted power brakes

• Directional signals

• Dual sun visors

• Dome lamps

• Cigarette lighter

• Quad headlamps

• Front and rear ash trays

• Coat hooks

• Dual horns

• Tubeless tires

• Bumper jack and wheel lug wrench

• Deluxe steering wheel

• Electric clock (not functioning)

• Vacuum windshield wipers

• Loop-pile Lurex-flexed carpeting

• Padded dashboard

• Inside door safety reflectors

• Rear seat foam cushions

• Dash courtesy lights

• Padded assist rails for passengers

Known Imperfections

• Electric clock is not functioning

Included

• Complete OEM “Ever Level” Air Ride system components

• Car cover

Ownership History

The consignor has attempted to keep this 1958 Pontiac Bonneville Sport Coupe “as close to original as humanly possible.” It has benefitted from a thorough and meticulous restoration and retains its original sheet metal and many original components.

Additional Notes

A Broad Arrow Group Consignment Specialist is working as an agent on behalf of the owner of this vehicle.

Contact: Matt Lowney Phone: 623.308.2640 email: mlowney@hagerty.com