What to Stock: Borla Axle-Back Atak, S-Type Muffler, Power Stations, and Car Audio
Back in 2020, when I took over purchasing for a 40-person automotive accessories distributor, I thought the job was mostly paperwork. It wasn't. The real job was figuring out which products our dealers and installers could sell without drowning in returns. I manage about $500,000 in annual orders across 9 vendors, report to both operations and finance, and process 60-80 orders a year. The question I hear most often from shop owners is simple: "What should we stock?"
The honest answer is: it depends. There's no universal inventory list for 2025. What works for a truck performance shop won't work for a mobile mechanic, and neither of those works for an online retailer selling audio upgrades. So let's break it down by scenario.
Before the scenarios, answer these three questions:
- Who is your core customer—enthusiasts, daily commuters, or other businesses?
- Do you make more money on installation labor, retail shelf sales, or both?
- How much time can your team spend on fitment verification and returns?
Your answers point to one of three paths.
Scenario A: You run a performance shop or work with truck and SUV enthusiasts
If your customers ask about exhaust sound before they ask about price, this is your lane. For most shops in this position, the Borla axle-back Atak exhaust system is a good core SKU. Axle-back installs are faster than full cat-back systems, which means your technicians can turn more jobs per day. And for a customer who wants a noticeable exhaust note without touching the factory mid-pipe, it's an easy recommendation.
But ATAK isn't the only Borla product worth stocking. Customers who search "Borla S-Type muffler inside" aren't necessarily looking for a cutaway photo. They're trying to understand why the sound is different from a stock muffler. I'm not an acoustics engineer, so I can't explain every internal chamber from a technical standpoint. What I can tell you from a procurement perspective is that the S-Type is positioned between the Touring and ATAK lines, which makes it a better fit for customers with long commutes or highway miles.
Fitment before order: 5 minutes of verification beats 5 days of correction. One wrong part number can turn a 45-minute axle-back install into a $200 return shipping headache.
Here's something vendors won't tell you: the part number on the catalog photo isn't always the part number you need for a specific trim. Borla makes different part numbers for different cab configurations, bed lengths, and engine options. Check before you commit. This is the prevention-over-cure part of buying that I've learned the hard way.
Scenario B: You're a mobile installer or a workshop that works outside a traditional showroom
If your team spends most of the day at customer sites or in a parking lot, your inventory should look different. It's tempting to think that a shiny branded exhaust is the fastest way to grow. But if your crew can't safely lift a vehicle or run a power tool on site, you're building on sand.
Start with the basics. An AV steel floor jack is one of those boring purchases that saves time every single day. It's not glamorous, but it's the tool your techs will grab more often than almost anything else. Make sure you match the jack's capacity and frame height to the vehicles you actually service. A low-profile long-frame jack is not the same as a standard car jack.
For field work, a portable power station 1000Wh LiFePO4 has become a genuine workhorse. It can run lights, charge batteries, and power diagnostic equipment without idling a truck all day. LiFePO4 chemistry matters here—it lasts longer and handles more charge cycles than older lithium-ion packs. Is it a replacement for a shop wall outlet? No. But it covers most of the situations your techs will run into.
I'm not an electrician, so I can't tell you how to wire a charging bank into your trailer. What I can tell you from a buyer's perspective is to check the inverter's continuous output before you order. A 1000Wh capacity doesn't mean it can run a 1500W heater. That's the kind of 5-minute spec check that prevents a very frustrating job site.
Scenario C: Your customers search "best audio for car rides"
If your customers are asking for the "best audio for car rides" but aren't chasing 130 dB sound competitions, you're in a different market. For them, "best" usually means clear phone calls, reliable Bluetooth pairing, and not having to turn the volume up to hear a movie on a road trip. That's a much simpler sale than a full custom system.
This is where marketing claims get tricky. Per FTC advertising guidelines (ftc.gov/business-guidance/advertising-marketing), claims like "best audio for car rides" have to be truthful and substantiated. I'm not saying you can't use that phrase—I'm saying have a reason behind it. If you're recommending a specific speaker package, know what makes it better for the customer's vehicle.
For small online audio orders, shipping costs can eat your margin. According to USPS, as of January 2025, First-Class Mail letter (1 oz) is $0.73, a large envelope (1 oz) is $1.50, and each additional ounce is $0.28. Those rates work for wiring kits and small accessories—not for exhaust systems. Verify current pricing at usps.com because rates change.
Real talk: "best audio for car rides" isn't a single product category. It's a customer need. If you stock only subwoofers, you'll miss the person who just wants quiet highway conversation. Stock a range: coaxial speakers, a compact powered subwoofer, and a head unit with wireless CarPlay. That gives you a bundle that actually sells.
How to tell which scenario you're in
Here's how I narrow it down when a dealer calls. Look at your last 10 customer requests. If 6 or more are about exhaust sound, performance, or truck accessories, you're in Scenario A. If 6 or more involve jacks, power, or completing work on-site, you're in Scenario B. If 6 or more are about convenience, cabin comfort, or "what sounds good on a road trip," you're in Scenario C.
Hybrids are fine. We stock one Borla axle-back Atak exhaust system SKU, one portable power station 1000Wh LiFePO4 unit, and an AV steel floor jack for the install bay. That mix works because it matches the daily work. The problem is buying inventory that doesn't match the jobs coming through the door.
And one last thing: create a checklist. After the third time a wrong part number came back from the warehouse, I built a 12-point purchasing checklist. It's saved an estimated $8,000 in potential rework. Check fitment, check revisions, check return policies, check marketing claims. The extra five minutes costs nothing. The alternative costs a lot more.
If you're not sure which scenario fits, ask your customers instead of guessing. A 10-minute conversation with a current customer will tell you more than a month of scrolling through forums. The right inventory isn't about having every product—it's about having the product that matches the way your shop makes money.