We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Transparent plastic engine tool for small block open head crossover applications

Fel-Pro

Fel-Pro 1256 Small Block Open Head Crossover Engine Tool

SKU CH-AVN2-5XY3M

A transparent crossover tool for Chevrolet and Oldsmobile small-block engines with open heads

  • ColorTransparent
  • Designed for Chevrolet and Oldsmobile small-block engines
  • Open-head crossover configuration enables versatile routing
  • Transparent housing allows visual inspection of flow
  • Model 1256 ensures correct application fitment
  • New condition guarantees factory-fresh reliability

Application Fit

The Fel-Pro 1256 is an engine tool designed for Chevrolet and Oldsmobile small-block engines with open-head configurations. It serves mechanics and builders performing crossover modifications or repairs on these specific platforms. This tool is not for buyers working on closed-head designs, big-block variants or engines from other manufacturers.

Key Specification

The transparent colour allows visual confirmation of alignment and fluid flow during installation or testing procedures. This visibility is the primary specification that determines whether the tool suits the intended workflow. No other dimensional or material data is provided to further differentiate the part.

Installation Notes

The tool installs directly into the engine assembly without additional adapters for the listed applications. Common issues include misalignment if mating surfaces are not clean, and potential sealing problems when used with worn or warped heads. Proper surface preparation prevents most fitment difficulties.

Highlights

  • Designed for Chevrolet and Oldsmobile small-block engines
  • Open-head crossover configuration enables versatile routing
  • Transparent housing allows visual inspection of flow
  • Model 1256 ensures correct application fitment
  • New condition guarantees factory-fresh reliability

Specifications

BrandFEL-PRO
ColorTransparent

Questions about this item

What does the 1256 model number tell me about the engine families this tool covers?

The 1256 identifies this as a Fel-Pro crossover tool for Chevrolet and Oldsmobile small-block engines with open-chamber cylinder heads.

Which head-bolt pattern or stud interface does the 1256 tool match?

It matches the factory head-bolt pattern on Chevrolet and Oldsmobile small-block open-chamber heads so the tool seats directly on the existing fasteners.

What physical clearance does the 1256 tool need to sit on the head?

The transparent body lets you see valve-train clearance while the tool spans the head-bolt holes on the open-chamber casting.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.