Speed Stop Auto Repair

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Speed Stop Auto Repair Specialized in the Duramax platform, and Allison transmissions.

10/05/2026

Website will potentially be shut down randomly over the next week or so.

If you need transmission lines, please email me [email protected] or get ahold of Masonbilt Performance

If you need Axiom Supply parts you can email me or order direct off that site.

Thank you for patience as we fix some bugs.

L5P kits in production. Masonbilt Performance is working on updating the instructions and QR code for it. We’ve got our ...
09/25/2026

L5P kits in production. Masonbilt Performance is working on updating the instructions and QR code for it.

We’ve got our test kits out in the wild with tons of positive feedback.

Lower temps with better flow and let’s not forget that lifetime warranty. If you need a kit before they hit the website get ahold of either us as we both have stock. We will let everyone know when the websites are updated.

09/17/2026

Attention everyone. With a family planned trip I will be out of the office for the week. Masonbilt Performance will handle any orders that come through, everything is as normal.

We will be back Monday, I suspect before the week is over Michael Mason will have a massive update for our 7.3 stuff.

Thank you to all our customers, friends, dealers, and family. If you are waiting for tracking on a drop ship order all those are coming any day.

Oh the excitement I have for this and a combined dream coming alive. Can’t wait to see these out in the wild. All built ...
09/15/2026

Oh the excitement I have for this and a combined dream coming alive. Can’t wait to see these out in the wild.

All built in house, measured multiple times, fittings triple checked to ensure you get that last kit you’ll ever need.

Huge thank you to Michael Mason and Masonbilt Performance for everything. Couldn’t ask for anyone better to be on board this deal.

The last set of 7.3 HPOP lines you'll ever buy.

Highest rated, made in USA, lifetime warranty.

Available October 2026.

Masonbilt x Speed Stop

To all the folks hitting diesels on the mountain this year, safe travels and good luck. With a baby on the way and custo...
09/11/2026

To all the folks hitting diesels on the mountain this year, safe travels and good luck.

With a baby on the way and customers to take care of we will have to sit this one out.

From myself, Masonbilt Performance, and the crew at Axiom Supply we appreciate you!

One last reminder, Tier One Transmissions is readily available with us, please get ahold of us for your transmission needs 👌🏻

09/09/2026

Looking for an A tech in Jerome ID

Pay is $35-$40 an hour, if your s**t don’t stink at all can be more.

Own tools required. If you can’t diagnose a vehicle please don’t apply.

401k offered, plenty of hours to be had. Please send an email if qualified and interested.

[email protected]

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Tapping into some more new territory. 10 speed time for us over here! Thank you to the fellas at Tier One and Fastlane A...
09/02/2026

Tapping into some more new territory. 10 speed time for us over here! Thank you to the fellas at Tier One and Fastlane Automotive for the lift! Excited to see what this built 10 speed platform is all about!

Where is my 17-19 L5P guys at? This past weekend we had the one and only from Masonbilt Performance come out and help do...
08/29/2026

Where is my 17-19 L5P guys at? This past weekend we had the one and only from Masonbilt Performance come out and help do some R&D on this 2017 GMC.

Not only do we have some YouTube videos coming, yes I’m finally joining whatever that crowd is called, however it’s more for help with install.

Back to the meat and potatoes, 17-19 kits are launching very very soon. We have a few test kits out there, working on instructions and updating the QR code on the boxes.

I’m beyond confident in our R&D, so if you’re in a pinch for a line set that you’ll never have to replace again email me for your 17-19 L5P. [email protected]

05/28/2026

ISO a T6 exhaust housing, for an s4 charger, .96 and 1.32.

Venmo, PayPal, whatever is clever. Used preferred, if you got one floating around for $200 shipped I’ll take it.

Looking for parts off the following WRECKED OR TOTALED TRUCKS. I wouldn’t advise anyone to cut up their truck for what I...
05/27/2026

Looking for parts off the following WRECKED OR TOTALED TRUCKS.

I wouldn’t advise anyone to cut up their truck for what I need. Again wrecked or totaled trucks only. Happy to pay for parts and shipping.

2020 plus GM L5P

2011-2016 Ford 6.7

2020 plus Ford 6.7

Please message the shop page or my personal if you have one of these. If not I’ll buy from the dealer.

PFA

Address

942 S Lincoln Avenue
Jerome, ID
83338

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 6pm

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