Fiat 131 Parts & Accessories

Fiat 131 Parts & Accessories

The Fiat 131 Mirafiori, produced from 1974 to 1984, was Fiat's mid-size family car for the decade and earned international rally fame through the 131 Abarth variant that won the World Rally Championship manufacturers title three consecutive years from 1977 to 1979 with drivers including Walter Rohrl and Markku Alen. The standard 131 used a range of inline-four engines from 1297cc to 1585cc in single and twin-cam configurations, while the Abarth competition cars used a 2.0-liter twin-cam unit producing over 200 horsepower in period trim. Street owners and restorers working on both standard and performance 131 variants need parts sourced to the specific engine and body generation, as the 131 evolved significantly across its production life. This collection covers every part category for the full Fiat 131 range including rally-inspired performance applications.

Popular Upgrades

Weber twin-barrel DCOE sidedraft carburetors are the most popular performance upgrade for twin-cam 131 Abarth-specification engines, providing improved airflow over the standard single-barrel units and allowing more aggressive cam timing without mixture compromise. Timing belt kits with complete tensioner hardware for the DOHC and SOHC engines are critical preventive service items given the interference design of both engine families. Koni adjustable shock absorbers in period specification, front strut bearing kits, and complete rear suspension bushing sets restore the handling precision that made the 131 Abarth competitive in international rallying, and stainless steel exhaust manifolds and silencer systems improve flow and eliminate the corrosion issues common on aging factory exhaust systems.

Performance and Handling

The Fiat 131 uses MacPherson strut front suspension and a live rear axle with leaf springs in standard form, a layout that the Abarth rally team homologated with significant modifications including coilover rear suspension conversion and reinforced front strut towers for competition use. Standard 131 handling benefits from quality replacement front strut inserts, revised sway bar end links, and fresh rear spring shackle bushings that restore the car's original understeer-neutral balance. The Abarth's wide-body fender extensions and wider wheel track give it a distinct suspension geometry from the standard car, requiring attention to Abarth-specific alignment specifications when setting up a restored competition or homologation replica.

What is the Fiat 131 Abarth and how does it differ from the standard 131?

The Fiat 131 Abarth was a homologation special produced to allow the twin-cam competition car to compete in the rally Group 4 category, featuring a 2.0-liter DOHC 16-valve engine, flared fenders, a front airdam, rear spoiler, and a five-speed close-ratio gearbox that distinguished it from the standard 131's more modest specification. Only approximately 400 road cars were built with the full Abarth specification needed for homologation, making surviving examples extremely valuable and driving demand for quality restoration parts that preserve their competition heritage. Engine components, wide-body panel sets, and Abarth interior trim pieces are significantly harder to source than standard 131 parts and benefit from suppliers with specific knowledge of the Abarth homologation car's technical details.

What carburetor does the standard Fiat 131 use?

Standard Fiat 131 models used a Weber 32 IBSH or Weber 34 DMTR single-barrel downdraft carburetor depending on engine displacement and market specification, with the single-cam 1297cc and 1585cc engines using different jetting and needle valve specifications that must be matched to the correct variant. The twin-cam 1592cc performance variant used a twin-barrel Weber 34 DATR unit with improved flow for the more aggressive cam profile, and the Abarth street cars used Weber 40 DCOE sidedraft carburetors in a twin arrangement for maximum airflow on the 2.0-liter competition engine. Rebuild kits must be sourced to the correct Weber model number to ensure correct gasket, needle valve, and accelerator pump compatibility.

Why These Parts Fit Right

Parts in this collection are cataloged across the Fiat 131's full production run from 1974 to 1984, with clear SOHC, DOHC, and Abarth engine variant identifiers to prevent cross-model ordering errors. Compatibility data covers both Italian domestic and North American export specifications with correct carburetor and emission equipment differences. Orders ship fast from stocked inventory to keep your 131 restoration or maintenance project on schedule.

Browse exhaust options in the performance exhaust collection, explore rally-inspired handling upgrades in the suspension catalog, or find air intake systems for SOHC and DOHC Fiat 131 applications.