GM HEI Distributor Mechanical Advance Curve Weight/Spring Kit

#550929

GM HEI Distributor Mechanical Advance Curve Weight/Spring Kit

Name: GM HEI Distributor Mechanical Advance Curve Weight/Spring Kit
Brand: Speedway Motors
SKU: 550929
Price: 15.49 USD
Availability: InStock
Rating: 4.8 (12 reviews)

12 Reviews

3 Questions

Modifies any GM HEI distributor with either clockwise or counter clockwise rotation
Center plate eliminates over centering of centrifugal weights
Comes complete with detailed instructions

$15.49

/each

In Stock

Quantity

Need Help? Call to Order

Add to a list

Select a vehicle to verify Fitment

Select Vehicle

Product Summary

Modifies any GM HEI distributor with either clockwise or counter clockwise rotation
Center plate eliminates over centering of centrifugal weights
Comes complete with detailed instructions
Installation of this kit may alter emission levels

See more details

Key Specs

MFG. Part #	550929
Brand	Speedway Motors

See more specs

Need To Know

Need help?

855.313.9176

View the Help Center

Quick and Easy Returns

Return Policy

Speedway Motors 550929 Details

Modifies any GM HEI distributor with either clockwise or counterclockwise rotation and offers plenty of curve possibilities. Center plate eliminates overcentering of centrifugal weights. Comes complete with detailed instructions.

NOTE: Installation of this kit may alter emission levels.

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Speedway Motors 550929 Specifications

KEY SPECS
MFG. Part #	550929
Brand	Speedway Motors

Ratings & Reviews

4.8

12 Reviews

Overall Assessment

Customers highly recommend the product, particularly for improving the performance of HEI engines, citing its easy installation and adjustability. They have praised its quality and practical features, including its ability to fine-tune HEI distributors and adjust timing for optimized horsepower. The included instructions are also highly regarded. Users expressed satisfaction as the product's performance exceeded competitors, leading to increased fuel efficiency and potential cost savings. The product's material quality and safety have resulted in repeated purchases given its superb performance.

Write A Review

4.8

12 reviews

Filter by Ratings

Sort Reviews

Easy to install, worked great!

5.0

3 months ago

James

Massachusetts

Verified

I have bought other kits before, they can be hit or miss. The bushings can be wonky, and springs can be crap- this was a good kit, fit well, and the springs were good quality. Gave me about 10-12 degrees advance on an Accel distributor

Would Recommend

Absolutely

5.0

a year ago

Wheelbarrow

Elkader Iowa

Verified

Made the vacuum advance work correctly

Would Recommend

Instructions included

5.0

2 years ago

Jay

Shoreline, WA

Verified

No other HEI kit has instructions telling you what is supposed to happen when you swap parts. Use any other kit and it's just guessing. Makes all the difference. The car drives like it just lost 500 lbs. and it gets better mileage.

Would Recommend

Great assortment for fine tuning

5.0

2 years ago

Joey Flames

Scotch Plains NJ

Verified

Able to fine tune my distributor

Would Recommend

I would buy anytime

5.0

2 years ago

Jimmytats

Edna Ks

Verified

Perfect as described and worked how I wanted

Would Recommend

Good stuff works wonders

4.0

3 years ago

Leroy

Canby Oregon

Verified

This kit is going in a 454 motor home this kit help's almost any HEI wake up and work right

Would Recommend

I would purchase this product again,good quality

5.0

7 years ago

none

Liberal, Ks.

Verified

installed in my HEI, distributor, easy to adjust, worked fine

Would Recommend

Great deal

4.0

8 years ago

Dtape

Chanute, KS

Verified

Shipped quick

Nice kit

5.0

8 years ago

Ratmaro

Florida

Verified

Great for fine tuning an HEI distributor

Would Recommend

Yes

4.0

9 years ago

Joe

Sault Ste marie

Verified

Good

Would Recommend

Load More Reviews

Showing 10 of 12 reviews

Questions & Answers

3 Questions • 4 Answers

Sort Questions

I have a g20 and I've rebuilt my hole distributor except this but there a lot wobbly becous I lost the spacers would this cause starting issues

by Marvin

• 8 years ago

2 answers

View Answers

I want to have 10 degrees mechanical advance. So I can set initial at 24-26 and total at 34-36 and leave vacuum cannister unhooked. Can I achieve this with this kit on an HEI SBC 350.

by Marsh

• 9 years ago

1 answer

View Answer

Do i need different spark plugs

by El Pastor

• 10 years ago

1 answer

View Answer

3 of 3 questions shown