SUBARU MT1-JVTHD158 Steel Unequal Exhaust Headers Set MOTOR-1

( Manufacturer Part Number: MT1-JVTHD158 ), ( Oe/oem Part Number: 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 ), ( California Prop 65 Warning: This Product Contains Chemicals Known To The State. ), ( Color: Metallic ), ( Material: T-304 Stainless Steel Exhaust ), ( Placement On Vehicle: Front ), ( Inlet Size: In ), ( Thickness: 3/8 Thick Flanges ), ( Style: 3 Piece Slip Fit Design, Up Pipe, Unequal Length Design ), ( Finish: Polished ), ( Fitment Type: Performance/custom ), ( Type: Exhaust Header ), ( Items Included: Exhaust Header Mounting Hardware ), ( Universal Fitment: No ), ( Mounting Style: Clamp-on ), ( Restricted States: California, Colorado, New York, Maine )

Review SUBARU Motor-1 Stainless Steel Unequal Length Exhaust Headers Set fits WRX STI 2002–2021

Introducing the Motor-1 MT1-JVTHD158 Steel Unequal Exhaust Headers Set, an essential upgrade for Subaru WRX STI owners looking to enhance their vehicle's performance and exhaust sound. These headers are meticulously designed and manufactured to deliver superior power gains and an exhilarating exhaust note.

The Motor-1 MT1-JVTHD158 headers are crafted from high-quality steel, ensuring durability and resistance to corrosion. The steel is thicker than OEM headers, offering enhanced strength and heat resistance. The unequal length design allows for optimal exhaust flow, reducing backpressure and improving overall engine breathing.

Each header comes with 158mm primaries, providing ample room for larger exhaust gases to flow freely. The collector diameter is also increased to accommodate high-performance exhaust systems. The design of these headers ensures that gases exit the engine at optimal angles, reducing turbulence and maximizing exhaust velocity.

Installation of these headers is made easier with included gaskets and hardware. The Motor-1 MT1-JVTHD158 headers are designed to bolt directly onto your Subaru WRX STI engine, making for a straightforward installation process.

These headers are not just about power gains and improved exhaust sound. They also contribute to weight reduction, as they are lighter than the stock OEM headers. This reduction in weight helps to improve acceleration and overall vehicle performance.

In summary, the Motor-1 MT1-JVTHD158 Steel Unequal Exhaust Headers Set is an excellent investment for Subaru WRX STI owners seeking to optimize their engine's performance and exhaust note. With their high-quality steel construction, unequal length design, and straightforward installation process, these headers are a must-have modification for any serious Subaru enthusiast.

Pros and Cons of Buying a Motorsport-1 (MT1-JVTHD158) Steel Unequal Exhaust Headers Set for 2002-2021 Subaru WRX STI

The Motorsport-1 (MT1-JVTHD158) Steel Unequal Exhaust Headers Set is a popular aftermarket performance upgrade for the Subaru WRX STI. This component aims to improve engine performance by enhancing the exhaust gas flow. In this analysis, we will discuss the advantages and disadvantages of investing in this product.

1. Improved Power: Unequal length headers allow for more efficient exhaust gas scavenging, resulting in an increase in power and torque.

2. Better Throttle Response: The improved exhaust flow aids in quicker throttle response, making the vehicle feel more responsive.

3. Enhanced Engine Sound: Unequal length headers provide a more distinctive exhaust note, adding to the overall driving experience.

4. Durable Construction: The Motorsport-1 headers are made of high-quality steel, ensuring longevity and resistance to corrosion.

5. Compatibility: These headers are designed specifically for the 2002-2021 Subaru WRX STI, ensuring a proper fit and function.

1. Cost: Unequal length headers are a premium upgrade, and the price tag might be a barrier for some buyers.

2. Complex Installation: The installation process of unequal length headers requires expertise in welding and fabrication, adding to the overall cost and time commitment.

3. Loud Exhaust Note: The enhanced exhaust note might not be preferred by some drivers, particularly those seeking a quieter ride.

4. Potential Check Engine Light: In some cases, installing unequal length headers might trigger the check engine light. However, this issue can usually be resolved with proper tuning.

The Motorsport-1 (MT1-JVTHD158) Steel Unequal Exhaust Headers Set offers several benefits, including improved power, better throttle response, enhanced engine sound, and durable construction. However, it comes with a significant investment, complex installation, and potential drawbacks such as a loud exhaust note and check engine light. Ultimately, whether this upgrade is worth the investment depends on individual priorities, preferences, and budget.

If you're an enthusiast seeking maximum power and an engaging driving experience, the Motorsport-1 unequal length headers might be a worthwhile investment. However, if you prioritize a quieter ride or have a limited budget, you may want to consider other performance upgrades or wait until you can afford this premium upgrade. Always consult with a professional mechanic or tuner before making any modifications to your Subaru WRX STI.

part # mt1jvthd158 prices

• $147.90-$449.69

specifications maniheader:

• for models: Wrx, Sti
• for makes: Subaru
• for years: 2002-2021
• manufacturer part number: MT1-JVTHD158
• oe/oem part number: 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21
• california prop 65 warning: This Product Contains Chemicals Known To The State.
• color: Metallic
• material: T-304 Stainless Steel Exhaust
• placement on vehicle: Front
• inlet size: In
• thickness: 3/8 Thick Flanges
• style: 3 Piece Slip Fit Design, Up Pipe, Unequal Length Design
• finish: Polished
• fitment type: Performance/custom
• type: Exhaust Header
• items included: Exhaust Header Mounting Hardware
• universal fitment: No
• mounting style: Clamp-on
• restricted states: California, Colorado, New York, Maine

general maniheader:

• condition: New
• Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers

seller maniheader:

• rating: 98.5%
• # reviews: 59628

payments maniheader:

• wallet: Apple-pay
• credit card: Diners-club
• other

shipping maniheader:

• service: Standard
• type: Fixed
• transit: 2-6 Days
• class: Standard
• cost: $0.00

offer maniheader:

• sold: 0
• started: April 1, 2026
• quantity: 10
• availability: In Stock
• options: Ship-to-home

returns maniheader:

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

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