SKU: 55191472245

1999-2000 Honda Civic Coupe (Si) 412-05-1900 Stainless Steel Manifold Header

Sale price$98.40 Regular price$109.33
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Description

1999-2000 Honda Civic Coupe (Si) 412-05-1900 Stainless Steel Manifold HeaderFitment: Acura Integra (GS, LS) 1990 2001 Acura Integra (GS R) 1992 2001 Acura Integra (Type R) 1997 2001 Acura Integra (RS) 1990 1999 Honda Civic Coupe (Si) 1999 2000 Honda del Sol (VTEC) 1994 1997 Feature: 1. Getting more air into your engine and more exhaust out is the key to a performance motor. That's where exhaust headers is significant as the first revenue of an exhaust system. Exhaust performance headers manipulate the air flow with the

Fitment:
- Acura Integra (GS, LS) 1990-2001
- Acura Integra (GS-R) 1992-2001
- Acura Integra (Type R) 1997-2001
- Acura Integra (RS) 1990-1999
- Honda Civic Coupe (Si) 1999-2000
- Honda del Sol (VTEC) 1994-1997


Feature:
1.Getting more air into your engine and more exhaust out is the key to a performance motor. That's where exhaust headers is significant as the first revenue of an exhaust system. Exhaust performance headers manipulate the air flow with the performance-robbing exhaust manifold that came with your car.
2.Headers provide each cylinder with its own mini exhaust pipe, which means exhaust headers prevent interference among cylinders; thus, the back pressure that occurs in common exhaust manifolds. When cylinders don't have to fight with each other to expel their exhaust, they can put more power through the wheels, pushing the vehicle. Combining with a high performance cold air intake, and a cat-back exhaust system, a header system removes all restrictions of your engine, then, it is able to perform at its full potential.

Specifications:
Product Name: Exhaust Header
Condition: Brand New
Warranty: 180 days
Surface: Mirror Polish
Features: Polished
Color: Sliver
Fitment Type: Performance/Custom
Material: Stainless Steel
Placement on Vehicle: Front

Package included:
1 * Exhaust Header Kit

Notes:
1. No Instruction, Professional Installation Recommended.
2. Please allow 1-3mm differs due to manual measurement.
3. Due to the different display and different light, the picture may not reflect the actual color of the item.

Warranty:
Returns: Customers have the right to apply for a return within 60 days after the receipt of the product
24-Hour Expert Online: Solve your installation and product problems
Shipping Notes
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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]
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SKU: 55191472245

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Vivian
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★★★★★ 4
Noticeable Support for Calm and Clarity
Size: 90 Count (Pack of 1), Size: 90 Count (Pack of 1)
This magnesium L‑threonate supplement has been a great addition to my daily routine. The capsules are easy to take, gentle on my stomach, and I’ve noticed a clearer, more focused feeling throughout the day. It also brings a nice sense of calm in the evenings without making me groggy. The formula feels clean and well made, and it fits effortlessly into a wellness routine. If you’re looking for a reliable magnesium option that supports relaxation and mental clarity, this one is a solid choice.
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Reviewed in the United States on January 29, 2026
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Cassie
Pawtucket, US
★★★★★ 5
Highly recommend for sleep, mood, mental health
Size: 90 Count (Pack of 1)
I recently re-discovered this supplement, and I'm buying extras left and right and recommending to everyone I talk to. I've been working on increasing my HRV and supporting my nervous system, and the L-threonate is a rockstar for that. I was taking glycinate for a few months, and I found an old bottle of this one and added just 2 capsules, and the effect on my sleep was immediate. Way better than melatonin. My Fitbit is tracking much lower restlessness and more deep sleep, and I actually wake up feeling refreshed ?? and before my alarm, even! I'm noticing lower anxiety and an overall better mood, and it's only been 4 days. This bottle definitely holds its value, and the price is good, especially if I can get these benefits with just the 2 caps and not 3.
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Reviewed in the United States on April 1, 2026
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Studying & doing nutrition for over 60 yEARS
Grantham, US
★★★★★ 5
Big winner for helping BETTER SLEEP
Size: 90 Count (Pack of 1)
Life Extension is top of the line on most things they have. also pricier than most, but I buy three items for them regularly for many years. This Neuro-Mag with L-Threonate is excellent for boosting better sleep. This is a newer addition to their line. I also suggest trying their Mult-B complex and their B-12 elite (sublingual) On nearly all items, their quality control is near THE TOP of all suppliers. They also have supported vitamin and supplement research on my items over the last 40 years
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Reviewed in the United States on May 29, 2026
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kacy
West Palm Beach, US
★★★★★ 5
Energy and Clear Thinking
Size: 90 Count (Pack of 1)
Great product. I use various forms of magnesium for different things . This form was suggested for clearer thinking and energy, and it delivers! I use it in the AM and it helps keep me energized I do think it varies by person how it affects you though as some folks get drowsy w/ it. Just a heads up to test on a weekend perhaps. I won't be without it now!
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Reviewed in the United States on April 5, 2026
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Jason K
Battle Creek, US
★★★★★ 3
Capsules Are Too Large and Have a Strong Plastic Smell
Size: 90 Count (Pack of 1)
I’ve purchased this product twice, but the capsule design is a big downside for me. The capsules are very large and difficult to swallow. On top of that, there is a noticeable plastic-like smell from the capsules, which is quite distracting and unpleasant. It makes taking them every day uncomfortable. The product itself may work as intended, but the capsule size and odor seriously affect the overall experience. I wish they would improve the capsule material or offer a smaller or odor-free option. If you are sensitive to smells or have trouble swallowing large capsules, keep this in mind before buying.
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Reviewed in the United States on February 3, 2026

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