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The urethane bumper fillers on a 1982-87 Buick Grand National, T-Type or Regal are a known weak point — three-plus decades of UV and heat cycling turns the factory panels brittle, and they crack, sag or shrink long before the rest of the car does. Replacement options split into three tiers: budget ABS-plastic import sets, OEM-style urethane or rubber reproductions, and premium fiberglass upgrades that trade factory flex for a panel that won’t crack again. All seven of these are parts actually sold for this specific car, not generic G-body bumper trim.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | GBodyParts (GBP) GM Original Style Front and Rear Bumper Fillers | $140-$180 per set | Amazon · eBay |
| 2 | Goodmark Bumper Filler Panels (TPO compound) | $150-$300 (rear alone ~$200, front+rear ~$300) | Amazon · eBay |
| 3 | Kirban Performance Reproduction GM-Style Bumper Filler Panels | $150-$300 | Amazon · eBay |
| 4 | The Parts Place OEM-Style Rubber Bumper Fillers | $40-$90 per piece | Amazon |
| 5 | KUAFU Front Bumper Fillers Set (4pc, ABS plastic) | $60-$130 for the 4-piece set | Amazon · eBay |
| 6 | Spoolfool Fiberglass Front Bumper Filler Set (Watts Performance) | $340-$740 depending on front/rear and finish options | Amazon |
| 7 | Highway Stars TPO Flexible Plastic Bumper Fillers | ~$399 for the complete set | Amazon |
The picks, in detail
GBodyParts (GBP) GM Original Style Front and Rear Bumper Fillers
Reproduction fillers GBodyParts markets as an improved chemical composition over GM’s originals, sold as matched front or rear sets for 84-87 Grand National/Regal.
- GM Original Style profile and mounting
- Improved urethane compound vs factory-spec material
- Sold as separate front and rear sets
- Direct-fit OEM-style replacement, no fabrication needed
- Well known and trusted in the Turbo Buick enthusiast community
- Front and rear sold separately — budget for both if replacing all four
Goodmark Bumper Filler Panels (TPO compound)
A TPO (thermoplastic olefin) filler, an upgrade over the material GM used in the 1980s, sold through Summit Racing and other muscle-car parts retailers.
- TPO compound, more UV/heat stable than original urethane
- Direct OEM-fit replacement
- Available separately for front and rear
- Widely stocked through mainstream muscle-car parts retailers
- Material upgrade over factory urethane reduces future cracking
- Among the pricier reproduction options
Kirban Performance Reproduction GM-Style Bumper Filler Panels
Molded from GM’s own last production run, sold in front, rear, or combined 4-piece sets by a shop specializing exclusively in Turbo Buick parts.
- Molds taken from GM’s final original production run
- No pock marks — ready to scuff and paint directly
- Sold as front-only, rear-only or full 4-piece set
- Specialist Grand National parts house, not a generic reproduction seller
- Matches factory appearance closely among the reproduction options
- Premium pricing similar to Goodmark’s tier
The Parts Place OEM-Style Rubber Bumper Fillers
A long-running GM reproduction-parts supplier’s rubber filler, sold individually or as a front-and-rear set.
- Rubber construction
- OEM-style fit for 1981-87 Regal/Grand National
- Sold individually or as a combined set
- Cheapest OEM-style option that isn’t a budget import
- Established GM-parts reproduction brand
- Rubber compound may not match urethane originals as closely as GBP or Goodmark’s material
KUAFU Front Bumper Fillers Set (4pc, ABS plastic)
A budget ABS-plastic import set covering all four fillers front and rear, the cheapest way to replace cracked originals cosmetically.
- 4-piece set (front and rear)
- ABS plastic rather than urethane/rubber
- Direct-fit for 1981-87 Grand National/Regal/T-Type
- Lowest-cost way to replace all four fillers at once
- Widely available on Amazon with fast shipping
- ABS plastic won’t flex like factory urethane — more prone to cracking on impact
- Fit and finish reports are mixed compared to reproduction-specialist brands
Spoolfool Fiberglass Front Bumper Filler Set (Watts Performance)
A fiberglass filler using the same compounds as modern bumper-cover materials, for owners who want a panel that won’t crack and sag again the way urethane does.
- Fiberglass construction, not urethane or ABS
- Modern TPO/TPUR-style compound blend
- Sold through Watts Performance/Spoolfool
- Won’t shrink or crack the way aging urethane does
- A genuine material upgrade rather than a like-for-like replacement
- The most expensive option on this list by a wide margin
- Fiberglass needs different prep/paint technique than a rubber or urethane filler
Highway Stars TPO Flexible Plastic Bumper Fillers
A Turbo Buick specialty parts house’s OEM-style filler, molded in flexible TPO plastic as a direct replacement for GM part numbers 12336190 and 12336191.
- Flexible TPO plastic, not rigid ABS
- Direct replacement for GM #12336190 and #12336191
- Sold as a complete front-pair-and-rear-pair set
- From a parts house that specializes exclusively in Grand National/GNX/Turbo Regal parts
- Flexible TPO avoids the cracking risk of rigid ABS import sets
- Sold as a full 4-piece set only, no option to buy just front or just rear
Buying tips
- Budget ABS-plastic sets are the cheapest fix but won’t flex like factory urethane — expect a harder, more crack-prone panel under impact.
- OEM-style urethane/TPO reproductions from GBodyParts, Goodmark or Kirban match factory appearance most closely and are the safest bet for a numbers-conscious restoration.
- Fiberglass is the only material here that solves the underlying problem (urethane degrading with age) rather than just replacing it with more of the same.
- Front and rear fillers are usually sold separately — check whether a listing covers one end or both before ordering.
- Highway Stars and Kirban are both Turbo Buick specialty houses selling only front+rear complete sets, so budget for the whole car rather than one end at a time.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.