Genie 8 ft. Master Belt Drive Rail Extension Kit-38476R - The Home Depot


Model # 38476R

Internet # 204218870

Store SKU # 1000012580

8 ft. Master Belt Drive Rail Extension Kit

Genie 8 ft. Master Belt Drive Rail Extension Kit

This item has been discontinued.
The Home Depot no longer carries this specific product.

$37.97 / each


Model # 38476R

Internet # 204218870

Store SKU # 1000012580

The Genie Master Belt Drive Extension Kit is an extension for C-channel and T-type rails to be used in addition to the 7 ft. (3-piece) rail to accommodate an 8 ft. high door. The extension kit is designed specifically for genie belt drive openers. It includes a belt and installs easily via detailed installation instructions.

  • For Genie SilentMax 1000/1200, QuietLift 800 and BeltLift openers
  • For C-channel and T-type rail extensions suitable for 8 ft. door installations
  • Belt included
  • Compatible Genie SilentMax 1200, SilentMax 1000, QuietLift 800 and BeltLift

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Maximum garage door height (ft.)  Product Depth (in.) 
Product Height (in.)  1.5  Product Width (in.)  15 
Rail extension length (in.)  20.25 
Brand/model/year compatibility  Genie SilentMax 1200, SilentMax 1000, QuietLift 800 and BeltLift  Drive System  Belt Drive 
Garage Door Part/Accessory Type  Extension Kits  Product Weight (lb.)  4.9 lb 
Returnable  90-Day 
Warranty / Certifications
Manufacturer Warranty  5 years 


Rated 4.5 out of 5 by 4 reviewers.
Rated 5.0 out of 5.0 by Exactly what you said it was. Most impressed with the shipping. The part was what it was supposed to be and installed easily. February 3, 2015
Rated 5.0 out of 5.0 by Easy to install After purchasing the a new garage opener at The Home Depot, we realized we needed an extension. i got online, found it, ordered and it shipped quick and was easy to install! Garage door opener is awesome and quiet too. March 18, 2014
Rated 5.0 out of 5.0 by Genie extension Easy to assemble and is working great. Genie should say on their boxes or instruction that the opener is for a 7' door and that you need to purchase an extension for an 8' door. July 22, 2014
Rated 3.0 out of 5.0 by Great, except no hardware This basically does what it says and is easy to install, except it does not come with any nuts or bolts. When you go buy your own hardware, make sure you buy 1/2" long bolts because anything longer will stick out and not let the carriage go past. I had to make a few trips back home depot to get the right bolt lengths. September 4, 2013
  • 2015-03-29T11:14:52.195-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co-hasreviews, tv_4, tr_4
  • loc_en_US, sid_204218870, prod, sort_default
1-4 of 4


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

Orders for this item may be expedited for an additional fee.

Other Delivery Options:

Express and Expedited shipping options are also available. Estimated arrival times are available in checkout.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.