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Description
1999-2000 Mazda Miata MX5 1.8L 4-2-1 SS 1-5/8 Header XForce HS-9918Enhance Your Mazda MX 5's Performance with the XForce 4 2 1 Stainless Steel Header Upgrade your 1999 2000 Mazda MX 5 Miata's exhaust system with the XForce 4 2 1 Stainless Steel Header (Part Number: HS 9918). This high quality header is engineered to improve exhaust flow, resulting in enhanced engine performance and a more responsive driving experience. Key Features: Tri Y Design: The 4 2 1 configuration optimizes exhaust scavenging, leading to
Enhance Your Mazda MX-5's Performance with the XForce 4-2-1 Stainless Steel Header
Upgrade your 1999-2000 Mazda MX-5 Miata's exhaust system with the XForce 4-2-1 Stainless Steel Header (Part Number: HS-9918). This high-quality header is engineered to improve exhaust flow, resulting in enhanced engine performance and a more responsive driving experience.
Key Features:
- Tri-Y Design: The 4-2-1 configuration optimizes exhaust scavenging, leading to increased horsepower and torque across the RPM range.
- Stainless Steel Construction: Made from durable 304 stainless steel, this header offers excellent corrosion resistance and longevity.
- Precision Engineering: Mandrel-bent tubing ensures smooth exhaust flow, while CNC-machined flanges provide a secure, leak-free fit.
- Fuel Type: Gasoline
- California Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Specifications:
- Brand: XForce
- Type: Exhaust Header
- Items Included: Header, Gaskets, Mounting Hardware
- Material: 304 Stainless Steel
- Substrate Material: Stainless Steel
- Primary Tube Diameter: 1 5/8 inches
- Header Style: Tri-Y (4-2-1) One-Piece Design
- Collector Attachment: 2-Bolt Flange
- Finish: Natural Stainless Steel
- Features: Mandrel-Bent Tubing, CNC-Machined Flanges, Bolt-On Installation
- Fuel Type: Gasoline
- Placement on Vehicle: Front (Engine Bay)
- Manufacturer Part Number: HS-9918
- OE/OEM Part Number: HS-9918
Vehicle Compatibility:
This header is designed to fit the following Mazda MX-5 Miata models:
- 1999-2000 Mazda MX-5 Miata: 1.8L 4-cylinder engine
Note: While some references indicate compatibility with 1998-2005 models, it is recommended to verify fitment for models outside the 1999-2000 range.
Items Included:
- XForce 4-2-1 Stainless Steel Header (HS-9918)
- Gaskets
- Mounting Hardware
Installation Notes:
- Professional Installation Recommended: Due to the complexity of exhaust system modifications, professional installation is advised to ensure optimal performance and fitment.
- No Welding Required: Designed for a bolt-on installation using standard hand tools.
- Complete Kit: Includes all necessary gaskets and mounting hardware for a complete installation.
Upgrade your Mazda MX-5 Miata's exhaust system with the XForce HS-9918 header to experience improved performance, durability, and a more exhilarating driving experience.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
Very firm and durable
Color: Cool Grey, Size: 24x24x12 inch
worked great for husbands surgery recovery. Very affordable, firmness was great, looked nice on the bed and also used it for the grandkids when they were watching a movie. Moved around with ease. Didn't use it to sleep with all night though. He could only make it half the night but that wasn't the pillows fault. It was the cast on his arm. Definitely did its purpose after surgery and the need to sit up in bed more. highly recommend
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Sasstie Wedge Pillow
Color: Cool Grey, Size: 24x24x12 inch
Perfect. I used it when I was recovering from hip surgery. Relieved a lot of pain in my hip and knee at a time when I needed relief.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
comfortable and firm!!
Size: 57 Inch, Color: Light Grey, Size: 57 Inch, Color: Light Grey
this pillow is huge i’m 5’8 and it’s perfect, as soon as i laid down it relived pressure in my back, i get hot fast and you can feel the cooling silk like texture, it’s weighted aswell, as soon as i opened it, it fluffed up an it’s been about 2 hours since and it’s already huge, it says 24-48 hrs to fluff up fully but idk how much bigger it could get lol it’s definitely worth the few extra dollars
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Reviewed in the United States on April 14, 2026
★★★★★ 5
I must have for pregnant women! Definitely helps sleep and comfort for sleeping!!
Size: 57 Inch, Color: Light Grey, Size: 57 Inch, Color: Light Grey
I do love this pillow, it does take up a lot of space on my queen bed! But when I wrap my legs around the pillow, it gives me much relief on my back! It also has basically a built-in pillow so you don’t even need to use a pillow! I love that I was able to unzip the outer material and wash it! You can use it to sit up and support your back, and when the baby comes, you can use to help with feeding! sometimes I have to turn it completely on the other side if I want to turn over, it’s big!! heavy! Very soft! Not flat at all! Firmness is great! Height is great! I highly recommend! I’m also five months! i got it about 2 months ago!!
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Reviewed in the United States on February 13, 2026
★★★★★ 5
Buy this one!
Size: 65 Inch, Color: Light Grey
This was a great buy! I looked through many many different options before buying and this one was the one I chose. Definitely a good choice. It keeps its shape and is cool to the touch which is amazing for a hot sleeper. It helps so much with my sore hips being 7 months pregnant. Fits great on my queen size bed with room still got my partner to sleep comfortably as well. Definitely recommend!
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Reviewed in the United States on May 19, 2026
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