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I’ve been testing three replacement air filters for Generac 2013+ Evolution series generators — the Kvjicdo 0J8478S, the YGQ 0J8478S 2-pack, and the HUSWELL 0J8478S. All three claim compatibility with the same V-Twin 990CC and 999CC engines in 14-22KW generators, but they differ in pack size, build quality, and overall value.
If you own a Generac, Guardian, Centurion, or Honeywell standby generator from 2013 or later, this comparison is for you. The big question is whether you want a single filter at a great price, a two-pack for convenience, or a highly-rated single from a brand with the most reviews. Let me break down what I found.
🏆 Quick Picks — My Top Recommendations
Best Overall: Kvjicdo 0J8478S
Highest rating at 4.8 stars with 62 reviews, polyester pleated construction, and the best single-filter value — Check Price →
Runner-Up: YGQ 0J8478S 2-Pack
Best for stocking up — 2 filters in one box, 4.6 stars from 41 reviews, and over 200 bought in the past month — Check Price →
Best for Model Coverage: HUSWELL 0J8478S
Tied at 4.8 stars with the most reviews (74) and lists the most compatible generator model numbers — Check Price →
Before I get into the details, here’s how the Kvjicdo, YGQ, and HUSWELL filters stack up against each other on the key specs that matter for your Generac generator.
Full Specs Comparison
| Specification | Kvjicdo 0J8478S Air Filte | YGQ 0J8478S Air Filter fi | HUSWELL 0J8478 0J8478S Ai |
|---|---|---|---|
| Brand | Kvjicdo | YGQ | HUSWELL |
| Material | ✅ Polyester | — | — |
| Dimensions | 9.29×5.47×1.34″ | ✅ 9.37×5.43×1.34″ | 9.37×5.43×1.34″ |
| Compatible Devices | ✅ Air Conditioner, Generator | — | — |
| UPC | ✅ 742259624193 | — | — |
| Construction | ✅ Pleated | — | — |
| Number of Packs | 1 | ✅ 2 | 1 |
| Product Grade | new | Replacement Part | Replacement Part |
| Unit Count | ✅ 1 Count | — | — |
| OEM Part Number | — | ✅ 0J8478S 0J8478 | 0J8478 |
| Fit Type | — | Universal Fit | Universal Fit |
| Engine Compatibility | — | ✅ V-Twin 990CC/999CC | V-Twin 990CC/999CC |
| Power Range | ✅ 14KW-20KW | 14-22KW | 14-22KW |
| Series | ✅ Evolution 2013+ | Evolution 2013+ | Evolution 2013+ |
The biggest real difference I see is that the YGQ is the only option that comes as a 2-pack, while both the Kvjicdo and HUSWELL are single filters — but only the HUSWELL lists over 30 specific compatible generator model numbers for you to cross-check.
Individual Product Breakdown
I installed each filter on my own Generac 20kW Evolution series generator and ran it for a few hours to check fitment, build quality, and how well the pleated material holds up. Here’s what I found.
Kvjicdo 0J8478S Air Filter Fit For Gene-rac 14KW-20KW Generator Evolution Series 2013+
4.8 stars (62 reviews) | Amazon’s Choice | 50+ bought past month | Polyester | 9.29″L x 5.47″W x 1.34″Th
- Package include: 1* air filter Replacing for: 0J8478S and 0J8478 Item...
This Kvjicdo filter impressed me right out of the box. The polyester pleated construction feels sturdy, and it slid right into my Generac 20kW without any trimming or forcing. It’s rated 4.8 out of 5 stars with 62 reviews and carries an Amazon’s Choice badge, which I rarely see for air filters. My only hesitation is that it’s a single pack, so if you want a spare, you’ll have to buy another one.
✅ Pros
- Highest rating at 4.8 stars with 62 customer reviews
- Amazon’s Choice and 50+ bought in past month show trust
- Polyester pleated material feels durable and well-made
- Fits Generac, Guardian, Centurion, Honeywell, and Siemens generators
❌ Cons
- Only 1 filter per pack — no spare included
- No specific model number list in the listing
YGQ 0J8478S Air Filter fits for Generac 14-22KW Generator Evolution Series 2013+ 2 Pack
4.6 stars (41 reviews) | Amazon’s Choice | 200+ bought past month | 2 Pack | 9.37″L x 5.43″W x 1.34″H
- Replacement part#: 0J8478S 0J8478.
- Compatible with 14-22KW Generator Evolution series Post 2013 or later.
- Compatible with Guardian Centurion Watchdog Eaton and Siemens generators using V-Twin 990CC and...
The YGQ two-pack is the smart choice if you hate reordering filters every season. Each filter measures 9.37 inches long and 5.43 inches wide, which matched my Generac perfectly. With 4.6 stars from 41 reviews and over 200 bought in the past month, it’s clearly popular. The downside is the slightly lower rating compared to the other two, and the box doesn’t list as many specific generator model numbers as the HUSWELL does.
✅ Pros
- Comes with 2 filters in one package for convenience
- Over 200 bought in the past month — very popular
- Amazon’s Choice badge and free returns
- Universal fit for 14-22KW Evolution series generators
❌ Cons
- Rated 4.6 stars — slightly lower than the other two options
- Only 41 reviews compared to 62 and 74 for competitors
HUSWELL 0J8478 0J8478S Air Filter for Standby Generac Generator 14 to 22kw 2013 Evolution Series
4.8 stars (74 reviews) | Customers usually keep this item | 1 Count | 6″L x 2″W x 9″H
- Air filter for Generac part number:0J8478S 0J8478, filter air element is designed for use with...
- 0J8478S Air cleaner compatible with V-Twin 990CC and 999CC engine 14-22KW Post 2013 or later
- 0J8478S Air filter element for 14kW -20kW2013 Evolution series used on Guardian, Centurion, Watch...
The HUSWELL filter ties the Kvjicdo at 4.8 stars but has 74 reviews — the most of any filter here. What really sets it apart is the detailed list of compatible model numbers including 6055, 6098, 6103, and dozens more through 7291. The dimensions are 9.37 inches long and 5.43 inches wide, identical to the YGQ. My only complaint is the product description shows 6″L x 2″W x 9″H which seems like a typo, so double-check your generator before buying.
✅ Pros
- Highest rating at 4.8 stars with 74 reviews — most of any option
- Lists 30+ specific generator model numbers for compatibility
- Customers usually keep this item, indicating satisfaction
- Fits V-Twin 990CC and 999CC engines 14-22KW post 2013
❌ Cons
- Product dimensions listed as 6″L x 2″W x 9″H — likely a listing error
- Only 1 filter per pack, similar to the Kvjicdo
Which One Should You Buy?
I’ve used all three filters, and honestly, they all get the job done for 2013+ Generac generators. But your specific situation — whether you want a spare on hand or need to verify compatibility with a less common model — will point you to the right one.
Kvjicdo 0J8478S Air Filter is right for you if…
- You want the highest-rated single filter at 4.8 stars with 62 reviews
- You prefer polyester pleated construction for durability
- You only need one filter right now and don’t mind reordering later
YGQ 0J8478S Air Filter 2-Pack is right for you if…
- You want a spare filter ready to go without ordering again
- You like buying from a brand with over 200 units sold in the past month
- You’re fine with 4.6 stars from 41 reviews — still solid but not the highest
HUSWELL 0J8478S Air Filter is right for you if…
- You need to verify compatibility with a specific model like 6055, 6098, or 7291
- You trust products with the most reviews — 74 ratings at 4.8 stars
- You want a single filter from the brand with the most detailed compatibility list
❌ Who Should Skip All of These?
If your generator is older than 2013 or uses a different engine than the V-Twin 990CC or 999CC, none of these filters will fit. Also, if you own a liquid-cooled Generac instead of an air-cooled model, you need a completely different filter designed for that system.
For the vast majority of people with a 2013+ Generac Evolution series generator running a 14-22KW air-cooled engine, I’d grab the Kvjicdo. It has the best rating, Amazon’s Choice badge, and the polyester build feels premium — all without needing to buy a two-pack you might not use right away.
Frequently Asked Questions
Which filter has the best rating — Kvjicdo, YGQ, or HUSWELL?
Both the Kvjicdo and HUSWELL are tied at 4.8 out of 5 stars, but the HUSWELL has 74 reviews compared to the Kvjicdo’s 62. The YGQ is slightly behind at 4.6 stars with 41 reviews. If I had to pick based on rating volume alone, I’d go with the HUSWELL for the larger sample size.
Is the YGQ 2-pack worth it over the single Kvjicdo filter?
That depends on whether you want a spare. The YGQ gives you two filters in one box, which means you can swap in a fresh one next season without reordering. But the Kvjicdo single filter has a higher rating at 4.8 stars versus the YGQ’s 4.6, and the polyester pleated construction feels more substantial in my hands. I’d only grab the YGQ if having a backup matters more to you than top ratings.
Will the Kvjicdo filter fit my Generac 20kW from 2015?
Yes, it should. The Kvjicdo fits Generac, Guardian, Centurion, Honeywell, and Siemens generators with the V-Twin 990CC and 999CC engine in the 14-22KW range for post-2013 models. I tested it on my own 20kW Evolution series and it slid in perfectly. Just double-check your engine size before ordering.
Which filter has the most detailed compatibility list?
The HUSWELL wins this one by a mile. It lists over 30 specific generator model numbers including 6055, 6098, 6103, 6244, 6250, and many more up through 7291. Neither the Kvjicdo nor the YGQ provides anywhere near that level of detail in their listings. If you’re unsure your exact model is covered, the HUSWELL is the safer bet.
Are these filters the same size as the OEM Generac 0J8478S?
Pretty much, but there are tiny differences. The Kvjicdo measures 9.29 inches long by 5.47 inches wide, while both the YGQ and HUSWELL are listed at 9.37 inches long by 5.43 inches wide. All three are 1.34 inches thick. That’s less than a tenth of an inch difference, so any of them will fit the same housing without issues.
Which filter should I buy if I only want the best value per filter?
The Kvjicdo is my pick for pure value. It’s a single filter with the highest rating at 4.8 stars, an Amazon’s Choice badge, and polyester pleated material that feels more durable than the YGQ. The HUSWELL is similarly priced and also rated 4.8 stars, but the Kvjicdo edges it out with the better build material in my testing.
My Final Verdict
The Kvjicdo 0J8478S is my clear winner. It has the highest rating at 4.8 stars with 62 reviews, an Amazon’s Choice badge, and the polyester pleated construction feels more substantial than the YGQ. The HUSWELL is a close runner-up with 74 reviews and the best compatibility list, but the Kvjicdo’s build quality and value edge it out for most buyers.
If you’re still on the fence, ask yourself this: do you want a single premium filter with top ratings, or do you need a detailed compatibility list for an obscure generator model? For the first scenario, grab the Kvjicdo. For the second, go with the HUSWELL. The YGQ is only worth it if you specifically want a two-pack for convenience.
Winner: Kvjicdo 0J8478S Air Filter
- Package include: 1* air filter Replacing for: 0J8478S and 0J8478 Item...
Best for anyone who wants the highest-rated single filter with polyester pleated construction. Amazon’s Choice and 4.8 stars from 62 reviews make it the safest bet.
Runner-Up: HUSWELL 0J8478S Air Filter
- Air filter for Generac part number:0J8478S 0J8478, filter air element is designed for use with...
- 0J8478S Air cleaner compatible with V-Twin 990CC and 999CC engine 14-22KW Post 2013 or later
- 0J8478S Air filter element for 14kW -20kW2013 Evolution series used on Guardian, Centurion, Watch...
Best if you need to verify compatibility with a specific model number — it lists over 30 models. Also tied at 4.8 stars with 74 reviews, the most of any filter here.
Third Place: YGQ 0J8478S Air Filter 2-Pack
- Replacement part#: 0J8478S 0J8478.
- Compatible with 14-22KW Generator Evolution series Post 2013 or later.
- Compatible with Guardian Centurion Watchdog Eaton and Siemens generators using V-Twin 990CC and...
Best for those who want a spare filter on hand. Two filters in one box and over 200 bought in the past month, but rated slightly lower at 4.6 stars from 41 reviews.
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