Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Advance Rewards
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product thumb
Product thumb
Product main large

Proform Starter, 1.4KW; 11:1, 153 & 168 Flywheels, Fits Chevy Small & Big Block V8 Engines

(5 reviews)
Part # 66256
90 day replacement if defective
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 66256
Warranty Details (90 DAY REPLACEMENT IF DEFECTIVE)
High-torque, gear-reduction design. 100% NEW, not rebuilt. Offset design results in more clearance between the oil pan and the starter, and can be rotated for additional chassis clearance. The high-torque, high-output motor spins the engine over faster than stock starters, delivering 40-50% more cranking power. 3.75-to-1 sealed gear-reduction drive and full ball bearing construction. Includes shims to set pinion-gear engagement (when necessary). Approved by all leading sanctioning organizations. Fits all Chevy V 6 and small and big block V 8 engines using 153 or 168 tooth flywheels. Heavy-duty PROFORM P/N 66258 weighs 1-1/2 lbs. more and is 1" longer than P/N 66256.

Product Features:
  • High-Torque Starter; Gear Reduction Type
  • Natural Finish
  • Made from Aluminum and Steel
  • For 11.1:1 Compression Ratio
  • Fits All Chevy V8 Engines
  • Billet Aluminum Mount
  • Power Output: 1.4 KW
  • 100% New Components; Not Re-man or Refurbished
  • Includes Shims for Pinion-Gear Engagement
  • Offset Design for More Oil Pan Clearance
  • Sold Individually
  • PROFORM Parts Brand Product
Specifications
Adjustable Mounting Block:
Yes

Direct Drive:
No

Gear Reduction Ratio:
3.75:1 r

Gear Reduction:
Yes

KW Rating:
1.4 kw

Manufacturer:
Proform

Maximum Recommended Compression Ratio:
11.0:1 ratio

Mounting Block Material:
Billet Aluminum

Mounting Bolt(s) Included:
Yes

Mounting Shims Included:
Yes

Performance:
Yes

Rotation:
Standard

Solenoid Attached:
Yes

Starter Finish:
Black Powder Coat

Starter Rotation:
Standard

Starter Type:
Mini

Voltage:
12 v
Loading...
Loading...Loading...Loading...Loading...Loading...
3 out of 5
5 Customer Reviews
0% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
1
4 Stars
2
3 Stars
0
2 Stars
0
1 Star
2
Pros
1
Lightweight
1
Looks Grate Smaler To
Cons
3
No
1
Yes
1
How Do I Modify
Reviewed by 5 Customers
proform starters
got a proform starter and right off the bat started draging noticed that aafter the first start the bendix teeth were worn so shimed it checked the clearance were fine next three or four starts the bendix was gone teeth gone had a motor man fix it put new bendix on it yesterday replaced the flex plate and put the proform back on it got it running 4 times then the same thing happened now the bendix totally gone again and i could not find one for it the first time took the motor man 3 weeks to find a bendix for it would not recomend this product
Cranks it up!
Verified Buyer -
Worked well on me El Camino with a ZZ3. Good detailed instructions. Had to re-index and use the shims but it turns it over with a good battery like there's no tomorrow.
i would buy this product again
Verified Buyer -
had some issues with bendix dragging after starting several times and installing and removing shims bendix cleared up ?? may be a problem later on removed all shims seems to be okay can only rate 4 stars
fit perfect bendix
Verified Buyer -
fit perfect starter bendix draged the first couple of tries made shimming did not help finally remove all shims and started engine 5 or 6 times and it work fine may be a problem later on if the bendix is sticking
ProForm high toquar stater .
The instruction ,what instrucions ? the one on how to modify to fit the motors that it states that it fits.
Bottom Line No, I would not recommend to a friend
Displaying Reviews 1 - 5Back to Top
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2026 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®