Powerstop Z26 Street Brake Kit FAQ: Z36-1011, Double X-Pipe, Microgard Oil Filter, and More

Quick background: I'm the parts lead at a small independent shop. I've been ordering brake kits, exhausts, and filters for eight years. My title sounds routine, but I've made enough mistakes to fill a wall of shame. Eleven documented screwups, roughly $12k wasted. Some were my fault, some were vendors giving me the runaround, and almost all of them could have been avoided with a better checklist. This FAQ is the thing I wish I had back then.

Is the Powerstop Z26 Street Brake Kit actually worth it?

Honestly? For a street car or a daily-driven truck, yes. The Powerstop Z26 Street Brake Kit has been one of my go-to recommendations for customers who want better stopping power without the squeal that comes from an aggressive track pad. The rotors are coated to resist rust, and the pads are ceramic, so they produce a fraction of the dust you get from cheap semi-metallic pads. In my experience, the Z26 kit also stays pretty quiet, even when it's cold outside. The trade-off is in the name: street. If you're planning track days or repeated hard braking from high speed, this isn't the pad you want. I recommended one to a friend who autocrosses, and he came back after one session with noticeable fade. I even had to write 'not a track pad' on his order sheet. Still, for 90% of the trucks and sedans that roll through our shop, it's a solid upgrade.

What's the difference between the Powerstop Z26 and the Powerstop disc brake pad set z36-1011?

The Z36-1011 part number comes up more often than you'd think. It's a Powerstop disc brake pad set in the Z36 truck and tow line. The Z36 pads use a carbon-fiber ceramic compound that's formulated for heavier vehicles, towing, and stop-and-go work. The Z26, by comparison, is more of a general street/crossover pad. Both can fit similar vehicles, but you need to check the application before assuming one is a direct substitute for the other. The edge of every pad is stamped with a friction code, and that code is based on SAE J866. It tells you the normal and hot friction coefficients. For a truck that hauls a trailer, I'd rather use the Z36 because the hot coefficient is typically higher, which means less fade on long downhill grades. Customers sometimes swap from Z26 to Z36 and expect a completely different pedal feel. It's not night and day, but the Z36 is more honest about what it was made for.

Does a double X pipe exhaust make a real difference?

Yeah, it can. A double X pipe is basically two X crossovers in the same exhaust system, which you usually see on a V8, especially one with headers. The goal is to balance the exhaust pulses between the two cylinder banks. The second crossover helps clean up the sound even more, cutting some of the rasp you get from a single X or a straight-through muffler. I've heard the same truck with a single X and then a double X. The double X sounded quieter at highway speed, but not in a bad way—it was more of a deep, even tone. If you're expecting a big horsepower gain, you'll probably be disappointed. We're talking a handful of horsepower at best, and on a stock engine it may be less. Sound is the real reason people do it. My advice: choose a muffler and resonator before you commit to a double X pipe, because the pipe is only part of the sound equation.

Microgard oil filter review: are they any good?

A few years ago, I would have said no. Then I cut one open. The filter media looked comparable to the middle-tier filters I was used to, and the bypass spring felt solid. For the price, Microgard is actually decent. The surprise wasn't the filter itself—it was how much people argued about it without any data. In my opinion, what matters more is whether the filter meets your vehicle's OEM bypass pressure spec and whether it will flow enough oil on a cold start. On a normal 5,000-mile oil change interval, I'd run a Microgard without losing sleep. On a heavy-duty truck or a high-mileage engine with known oil pressure concerns, I'd step up to a premium brand. That's not because Microgard is bad. It's because oil filters are cheap insurance, and the last thing you want is the cheapest part on the engine being the reason a $10,000 engine gets damaged.

What about a 14x25x1 air filter—is that for a car?

This trips up a lot of people. A 14x25x1 air filter is a common size for a return air filter in an HVAC system. It keeps dust out of a furnace or air handler. It's not a standard engine air filter size, even though it shows up in auto parts searches because people enter measurements instead of part numbers. I keep one in my shop's furnace, but I would never install it on a car. The dimensions don't tell you the filter media, the sealing surface, or the pressure drop. If you're looking for an engine air filter, find the OEM part number printed on the existing filter or in the owner's manual. I made the mistake of assuming any 14-inch panel would fit an old carbureted car. It didn't seal properly, and I ended up with dust streaks past the edge. Part number lookup is faster than guessing.

Why did you stop buying cheap no-name brake pads?

Because I lost money being wrong about a cheap pad. In my first year, 2017, I ordered a set of no-name pads that were supposedly the same size as the OEM ones. I assumed same dimensions meant same performance. Didn't verify. Turned out the friction code on the edge was lower, and the backing plate was noticeably thinner. We installed them on a customer's truck, and it stopped okay for about a week. Then he came back after a loaded downhill stop with the brakes smelling hot. That red flag turned into a full redo and a very uncomfortable phone call. The whole thing cost about $890 in parts and labor, plus a bad afternoon of trust. Since then, our pre-check list includes verifying the existing pad's friction rating, shim style, slot pattern, and backing plate thickness. Powerstop publishes this info for a reason. Use it.

Can I order a small Powerstop kit without a dealership account?

Yes, and this matters more than people think. I started in a two-bay shop where I needed one or two kits at a time. One distributor made it clear that a $400 order was barely worth their time. I didn't argue. I found a supplier who took the small order seriously, and they got every order from me after that. Over the years, those small orders added up to five-figure invoices. The point is simple: small doesn't mean unimportant. If you're a startup shop or a DIY owner doing a one-off brake job, you should not have to buy bulk kits to get a straight answer. Powerstop sells through normal channels, and you can get the Z26 kit without a big-volume contract. In my experience, the best vendors treat a $300 order the same way they treat a $30,000 order. That's how they earn the bigger one.

What's the biggest mistake people make installing a Powerstop Z26 kit?

Skipping the break-in procedure. This is the most frustrating part of brake pad installs because it's easy to prevent, but people still ignore it. You need to do several moderate stops from 30 mph, then let the brakes cool before you park it. A friend of mine installed a new Powerstop Z26 kit and immediately went for a hard test drive. The pads glazed, and he blamed the kit. The pads were fine. The procedure was skipped. I've done it myself too, which is why I now put a brake-in note on every invoice. The other mistake is not cleaning the rotor surface before installation. A little oil or even finger grease on the friction material can ruin the first stop. It sounds obvious, but I've had to redo it. Our checklist has caught 47 potential problems in the last 18 months. Most of them were preventable. That's the lesson.