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If you've come across a used Boss Frog rollbar and installed it in your Miata, the seatbelts sometimes wont retract as well as they did from the factory due to binding. These bolt-on adapters can help the seat belts slide and retract a bit easier but will NOT restore OEM function.

TO BE CLEAR: if your belts retract on their own, these ARE NOT for you. If your belts are binding and wont retract AT ALL, these extenders will HELP the belts to retract but NOT to OEM levels of retraction.

*****Installation does require cutting off the OEM belt guides.****

These were used on 2005 and earlier Boss Frog and Hard Dog Rollbars. BF started including them after 2005 until BF closed their doors a while back. We have confirmed fitment up to 1997 (see video). See below note for 98-200X model years.

Available as single sides or pairs ("Set" in the drop down ordering menu =2 pieces).

Assuming that you tilted the seatbelt reel toward the inside of the car and trimmed the plastic bits properly per the Boss Frog instructions, these seatbelt adapters may help to improve the belts retraction if your belts are binding in the OEM mounts. Factory level of retraction is a thing of the past though... you've modified your car beyond that ...


Original Boss Frog instructions are available for download here: BOSS FROG INSTRUCTIONS


***NOTE**** Izzy's simply reproduces the brackets as designed by BF per a customer request. We modified the openings to make it easier for installation onto the belt and the bolt hole for the shoulder bolt to actually sit in. We had no input into the design or function of the design.

TEST that your belt tongue will pass through the extenders BEFORE you cut off the OEM guide.

Depending on the year of your car, there may be way more force/pressure needed to get the seat belt tongue through the opening of the extender than the BOSS FROG instructions let on. We have added some clearance to original design of the opening to help pass the tongue through the opening. If you cant get the tongue through, you can modify the plastic on the tongue by sanding or shaving it down. Do NOT modify the extender for clearance.

The tongue installation video uses a 91-97 miata seat belt. Other years may require modification to the plastic surround of the seat belt tongue. If you are not comfortable modifying the plastic around the seat belt latch in your 98-200X DO NOT BUY THESE EXTENDERS. We have not tested them on later years and cannot confirm that they fit.

NO RETURNS ACCEPTED for 98 -newer models.

Satin Black is only available with Delayed Production. We will include it with other satin black pieces when we send out for powder coat. Satin Black pieces are NOT kept in inventory.

If you need the extenders "ASAP/next week/I need these for an autocross this weekend".... DO NOT expect them before 3-4 weeks. With current (6/23) steel prices, once inventory is depleted, these will be cut per order. If the page shows we're out of stock, choose the Delayed Production option


Updated 6/14/23

Miata Roll Bar Seat Belt Adapter

  • We do NOT keep these "in stock" While we do cut batches of ~10-20 sets at a time, we do NOT have the manpower or sales volume to constantly keep these in inventory. 

    EXPECT 4 weeks from ordering before shipping. Please do not order if you need them immediately. If you'd like, message us to check inventory before you order

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