ARCTIC CAT Mikuni Bst Carburetor 34MM 0437-008/0470-372

( Brand: Arctic Cat ), ( Manufacturer Part Number: 437-008 ), ( Engine Type: 4-stroke ), ( Type: Carburetor ), ( Machine Type: Atv ), ( Country Of Origin: Japan )

Review ARCTIC CAT Mikuni Bst 34mm Carburetor 0437-008/0470-372 fits 454 1996–1998

The **Arctic Cat 437-008 Mikuni BST 34mm Carburetor** is a precision-engineered component designed specifically for Arctic Cat snowmobiles produced between the model years **1996 and 1998**, including the iconic **454** series. This high-performance carburetor features the **Mikuni BST (Bore Size Tuned) 34mm throttle body**, a design optimized for enhanced throttle response, improved fuel efficiency, and consistent power delivery under varying conditions. The BST technology ensures a refined air-fuel mixture, reducing hitches and surges while maximizing torque and acceleration, making it ideal for both on-trail and off-trail riding. Built with a durable **aluminum body**, the carburetor is lightweight yet robust, capable of withstanding the demands of heavy-duty operation in cold, snowy environments where performance and reliability are critical.

The **437-008** carburetor incorporates a **needle-and-seat assembly** that allows for precise calibration, ensuring optimal performance whether you're cruising at high speeds or navigating tight turns. Its **floating bowl design** prevents fuel starvation during aggressive maneuvers, while the **sealed gasket system** maintains a tight, leak-free connection to the intake manifold, reducing the risk of vacuum leaks that could compromise engine efficiency. The **Mikuni BST** tuning further refines the carburetor s performance by adjusting the bore size to match the engine s specific requirements, resulting in smoother operation and better fuel atomization for cleaner combustion.

For Arctic Cat owners seeking a **direct replacement** for the original equipment, this carburetor is a **drop-in upgrade** that maintains compatibility with the **0470-372** part number, ensuring an exact fit without the need for modifications. Whether you're restoring a classic 454 or upgrading an existing unit, the **437-008** delivers a balance of power, durability, and ease of maintenance, making it a trusted choice for enthusiasts who demand nothing less than peak performance from their snowmobile. Its **OEM-level quality** ensures that it meets Arctic Cat s stringent engineering standards, providing the same level of dependability that Arctic Cat snowmobiles are known for.

### **Pros and Cons of buying a Arctic Cat 437-008 Mikuni BST 34mm Carburetor (1996 1998 454 Engine, Part Numbers: 0437-008/0470-372)**

#### **Pros**

1. **OEM Fitment and Reliability** This is an original equipment (OEM) Mikuni BST carburetor designed specifically for Arctic Cat snowmobiles in the 1996 1998 model years with the 454 engine. It ensures proper fitment, throttle response, and performance without the need for extensive modifications.

2. **Proven Performance** The BST (Bore Size Tuned) carburetor is known for delivering smooth, consistent power across a range of RPMs. It provides a good balance between low-end torque and high-end acceleration, which is ideal for snowmobiling where both are important.

3. **Durability** Mikuni carburetors are generally robust and built to last, especially when maintained properly. The 34mm bore size is a standard for mid-sized snowmobile engines, offering a good mix of airflow and fuel efficiency.

4. **Ease of Tuning** The BST carburetor is relatively straightforward to adjust compared to some aftermarket alternatives. It features a pilot jet, main jet, and idle mixture screw, allowing for basic tuning to optimize performance or fuel economy.

5. **Availability of Parts** Since this is an older but still common OEM part, you can typically find replacement jets, gaskets, and seals without much difficulty. Mikuni also produces aftermarket parts for this carburetor, which can extend its lifespan.

6. **Cost-Effective for OEM Replacement** If your original carburetor is failing, replacing it with an OEM unit is often cheaper than upgrading to a high-performance aftermarket carburetor unless you re pursuing significant power gains.

7. **Compatibility with Stock Engines** It works seamlessly with the stock 454 engine in these Arctic Cat models, meaning no drivetrain or exhaust modifications are required to install it.

---

#### **Cons**

1. **Limited Performance Gains** If you re looking to significantly increase horsepower or torque, this carburetor is not an upgrade. It is tuned for stock performance, so expect similar power output to the original unless you modify jets or install a performance air filter.

2. **Potential for Fuel Economy Issues** The BST carburetor may not be as fuel-efficient as newer, more refined carburetors or fuel-injected systems. If fuel economy is a priority, you might need to tune it carefully or consider alternatives.

3. **Maintenance Requirements** Like all carburetors, this one requires regular cleaning and jet adjustments to prevent fouling, lean conditions, or poor performance. Neglecting maintenance can lead to rough idling, stalling, or reduced power.

4. **Age-Related Wear** If the carburetor is from a used or salvaged unit, it may have internal wear (e.g., worn throttle valves, sticky diaphragms, or clogged passages). Always inspect it for leaks, cracks, or excessive carbon buildup before installation.

5. **Limited Aftermarket Support** While Mikuni does produce parts for this carburetor, aftermarket support (e.g., performance jets, high-flow alternatives) is not as extensive as for newer or more popular models. You may need to source parts from specialty snowmobile suppliers.

6. **Potential for Flooding or Hard Starting** If the pilot jet or idle mixture is not set correctly, the carburetor can flood (excess fuel) or struggle to start, especially in cold conditions. This requires some tuning experience to resolve.

7. **Not Ideal for Heavy Modifications** If you plan to install a larger air filter, exhaust, or clutch, the stock carburetor may not handle the increased airflow efficiently without further tuning. In such cases, a performance carburetor (e.g., Mikuni 36mm or 38mm) might be better.

---

### **Conclusion**

The Arctic Cat 437-008 Mikuni BST 34mm carburetor is a solid **OEM replacement** for the 1996 1998 454 engine models, offering reliability, ease of installation, and proven performance. It is the best choice if you need a **direct drop-in replacement** for a failing original carburetor and want to maintain stock-like power and drivability.

However, if you re looking to **maximize performance, improve fuel efficiency, or modify the engine significantly**, this carburetor may not be the best long-term solution. In those cases, consider:

- A **performance Mikuni carburetor** (e.g., 36mm or 38mm) for more airflow and power.

- A **fuel-injected conversion kit** (if available for your model) for better reliability and efficiency.

- A **used or rebuilt OEM carburetor** if cost is a concern, but ensure it s in good condition.

For most **stock or lightly modified** 1996 1998 Arctic Cat 454 owners, this carburetor is a **practical and cost-effective choice** as long as you re prepared to maintain it properly.

---

### **Recommendation**

- **Buy it if:** You need a **direct OEM replacement**, want reliable stock performance, and are willing to perform basic maintenance.

- **Avoid it if:** You plan to **heavily modify** the engine (e.g., big air, exhaust, clutch) or seek **significant power gains**.

- **Mikuni 36mm or 38mm BST carburetor** for better airflow and tunability.

- **Rebuilt or high-quality used OEM carburetor** to save money while ensuring reliability.

- **Fuel injection conversion** (if compatible with your model) for modern efficiency and reliability.

Details:

1996 BEARCAT 4X4 96A4A-AP- 1996 -33-01 1997 ATV 2X4 97A2A 1997 -34-01 97A4A 1997 -34-02 1998 454 98A2A 1998 -35-01 98A4A 1998 -35-04. We acquired a box of new and used Arctic Cat carbs. Replaces Part # 0437-008, 0470-317, 0470-340, 0470-372, 0570-016 Fits ATV model's. It has had that black cover taken off of it and will need a new or used one.

part #: 437008 prices

• $79.51-$399.99

specifications carbthrotatv:

• for models: 454
• for makes: Arctic-cat, Arctic
• for years: 1996-1998
• brand: Arctic Cat
• mpn: 437-008
• engine type: 4-stroke
• type: Carburetor
• machine type: Atv
• country of origin: Japan

payments carbthrotatv:

• credit card: Mastercard
• other
• wallet: Paypal

shipping carbthrotatv:

• transit: 5-8 Days
• cost: $5.00
• class: Standard
• type: Fixed
• carrier: USPS
• service: USPS Ground Advantage

general carbthrotatv:

• condition: Used
• ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Carburetors

offer carbthrotatv:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: May 21, 2026

seller carbthrotatv:

• rating: 100.0%
• # reviews: 988
• city: Afton, Wyoming

returns carbthrotatv:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

Arctic Cat 437-008 Is Similar To:

• 0437-448 Carburetor Arctic Intake Cat (32.8% similar) ...(September 11th, 2015)
• 0470-317 Arctic Cat Carburetor Carb (38.6% similar) Comes as pictured. Items are shipped using USPS, ups, and FedEx. Slide is frozen, will need to be rebuilt. Will fit the years and model's in compatibility list. Was removed from a running 1998 Arctic Cat 454 4X4, with 1,492 miles. Please through messages. Carburetor is in poor condition...(March 21st, 2018)
• 0470-361 Arctic Cat New Oem 1998-2000 (37.9% similar) New oem Arctic Cat atv quad factory carb carburetor part number 375 fits model's 1998 500 4X4 98A4G-AP 1999 99A4G-AP 2000 man green A 2000 ATM4AUSR red A 2000 ATM4AUSG...(December 23rd, 2016)
• 0470-646 Arctic Cat Oem Textron Carb Cvk (30.3% similar) ...(April 28th, 2018)
• 0470-738 Arctic Cat 400 A Trv (31.5% similar) For a shipping quote. Good usable condition. We race and ride. All parts except those below have a 30-DAY guarantee...(February 18th, 2017)
• 0470-742 Cvk36 Keihin Prowler Cat Atv H1 Carburetor Arctic 650 500 (35.9% similar) We and our dealers attempt to be as accurate as possible. Our 50TH year of Arctic Cat support. RV sports Arctic Cat your closest source to the factory. Khan CV 36 carb, used on various 500 and 650 atv's and prowlers from with the electric choke. This is a great way to have a spare carb on the shelf...(August 3rd, 2015)
• 0470-859 Arctic Cat Carb Cvk New Oem 886224669748 (32.8% similar) New oem Arctic Cat carb CV 400 H1OEM part number: 0470-859ITEM only fits specific model's listed. New oem Arctic Cat carb CV 400 H1OEM part number: 0470-859ITEM only fits specific model's listed. The picture could be generic...(May 8th, 2018)
• 0570-328-sxs Arctic Cat Oem Throttle Body (26.7% similar) U-pics broker is Roanoke, inc. Genuine oem Arctic Cat throttle body. State: choose appropriate armed forces unit AA, ea or ap from the drop down list zip code: enter code orders are shipped by USPS priority mail. Street address: complete both lines with all applicable information including unit ...(January 12th, 2017)
• 0694-028 Arctic Cat Oem Carburetor Assembly (39.3% similar) ...(March 18th, 2018)
• 1p190256cwfe45652 Unbranded Arctic Cat Carburetor Carb Red Green Us 715895277672 (37.7% similar) Part: 1P190256CWFE45652 prices...(March 19th, 2019)
• 3130691 Arctic Cat Polaris Nos Oem Ultra Sp Touring Mikuni Carburetor (39.2% similar) Nos Polaris ultra Sp touring mikuni carburetor. If you are in need of a part for your atv, UTV, PC or snowmobile and do not see it listed...(September 18th, 2018)