Description
Comparison points and tradeoffs
When comparing Lower Crank Pulley Spacer, .375 Inch with other Crankshaft Pulleys options, use this source-backed detail as the primary discriminator: Manufacturer Part Number: 91015485-.375.
Use this second fact to evaluate the tradeoff: Model: Speedway Motors. A third point to compare across alternatives is: These lower crankshaft pulley spacers are specifically designed for the Small Block Compatible with Chevy engines.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
| Manufacturer | Speedway Motors |
|---|---|
| Brand | Speedway Motors |
| Model | Speedway Motors |
| Item Weight | 1 pounds |
| Product Dimensions | 4 x 4 x 1 inches |
| Exterior | Anodized |
| Manufacturer Part Number | 91015485-.375 |
Product Description
Source product highlights
- These lower crankshaft pulley spacers are specifically designed for the Small Block Compatible with Chevy engines
- Available in 3 widths, .200″, .250″, and .375″ to provide precise pulley alignment for your application
- Features a billet aluminum construction with a natural finish
- It has a 3-bolt configuration and are .200″, .250″, or .375″ thick depending on the width selected
- Outside diameter measures 4″ and it has a .88″ inside diameter




David C. Wells –
Everybody knows when building a engine all of the little parts that need to be put on soon add upAfter finding out that my pull set up was out of alignment I was looking around at spacesMost spaces are around $35 and moreI found this one and the build quality is fantasticJust measure the crank pulley all of the way against the harmonic balance and then get a level and a line the water pump pulley with crank pulley and take a measurement with Vernia calipersMine was .25 so I was able to find the correct spacerThank you Speedway for not gouging me on the price
John Jutras –
When going for a 327 to a 350 the harmonic balancer pulley did not light up this fixed the problem
Susan F. –
quality product. I wish they made a 3/4 inch spacer