SKU: 29815764536

Koyo Aluminum Radiator - 06-11 Civic Si

$173.16 $192.40
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 6 - Aug 11

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Description

Koyo Aluminum Radiator - 06-11 Civic SiKoyorad has engineers their radiators with precision, to directly replace the OEM radiator, maintaining all mounts for the factory fans, fan switch, A C condenser, and factory hoses. Koyorads advanced engineering and design methods, impeccable welds, experienced furnace brazing, and triple pressure testing for quality has earned their excellent reputation in performance. Koyo's thick dual core crafted aluminum radiators are a direct OEM replacement

Koyorad has engineers their radiators with precision, to directly replace the OEM radiator, maintaining all mounts for the factory fans, fan switch, A/C condenser, and factory hoses. Koyorad’s advanced engineering and design methods, impeccable welds, experienced furnace brazing, and triple pressure testing for quality has earned their excellent reputation in performance.

Koyo's thick dual-core crafted aluminum radiators are a direct OEM replacement radiator's that offer maximum cooling efficiency and has integrated OEM rad-fan mounting provisions.

Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo all aluminum race radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components. Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing. Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer.

Features

  • 36mm V Core series radiator
  • Precise tube and fin alignment
  • Nocolok-R brazing with brushed polish finish
  • High density fully brazed Hyper Core
  • Precision TIG welded
  • Dual row construction
  • Bolt-on fitment with OEM fans, hoses, and sensors
  • 1/8” NPT female accessory fitting
  • Billet drain plug included
  • Triple Pressure tested for high performance needs
  • Radiator cap not included

Vehicle application: 06-11 Civic Si Coupe & Sedan (M/T)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 29815764536

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4.4 ★★★★★
Based on 28 reviews
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C
Verified Purchase
"cpalm1"
Boise, US
★★★★★ 5
Great value
Size: 26"/17"/14"
Used on a 2018 outback. These are an amazing value. All 3 fit perfectly and work great. They work smooth and silently
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
L
Verified Purchase
Lola
Birmingham, US
★★★★★ 4
Great price, easy install; fit
Size: 25" 22" 15"
Great price, easy install; fit My Volkswagen Tiguan 2023 S. Glad I waited for next day delivery instead of going to autozone where comparable wipers cost $45 and that was WITH two coupons!! It would have been $60 without. The ONLY thing that could be better is warning you to make sure when you’re pressing in the wiper that you hold it from the very top or else your finger will slam down into the trap part and it will hurt like heck and make you bleed (personal experience this afternoon…) Otherwise great. Took off one star for that but maybe Im the only person thats ever happened to? (Im doubtful.) its not directly related to the product itself but just would be a helpful tip for ANY windshield wipers to include!
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Reviewed in the United States on April 18, 2026
M
Verified Purchase
Mason
Phoenix, US
★★★★★ 5
Great product
Size: 9.3" x 9.7" x 1.8"
I recently installed the BOSCH 6029C HEPA Cabin Air Filter, and the difference was noticeable right away. The air inside my car feels much cleaner and fresher, especially when driving in traffic or through areas with a lot of dust and pollution. It does a great job filtering out odors, pollen, and even fine particles—I’ve had fewer allergy issues since switching to this filter. Installation was straightforward and only took a few minutes, even without much mechanical experience. The build quality is solid, and it fits perfectly without any gaps or issues. Compared to standard cabin filters, this HEPA version is definitely a step up in terms of filtration performance. Overall, I’d highly recommend this to anyone looking to improve their in-car air quality. It’s a small upgrade that makes a big difference in comfort, especially for daily drivers or people sensitive to allergens.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
C
Verified Purchase
Chad I
Whiting, US
★★★★★ 5
Good quality!
Size: 9.3" x 9.7" x 1.8"
This cabin air filter is seriously a game-changer for my car's interior air quality. I was getting tired of that stale, dusty smell every time I turned on the AC. Swapping it out was surprisingly easy, and the difference was noticeable almost immediately. It really does trap all those tiny particles, like pollen and dust, that used to make my allergies flare up. Now, the air inside my vehicle feels so much fresher and cleaner. I've been recommending this brand to all my friends who are looking for a reliable filter. It's definitely worth the investment for a more comfortable driving experience. Seriously, if you're on the fence, just go for it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
B
Verified Purchase
Bartek
Birmingham, US
★★★★★ 5
Noticeable upgrade in air quality and a seamless installation
Size: 9.3" x 9.7" x 1.8"
I'm generally skeptical of the "HEPA" marketing for automotive filters, but after installing this in my Honda, the reduction in exterior odors—especially exhaust and pollen—is actually significant. The construction feels far more robust than the flimsy OEM paper filters I’ve used in the past; the pleats are dense and well-reinforced, which gives me more confidence in its filtration efficacy over a 12,000-mile interval. Installation was straightforward and took less than five minutes. It’s a precision fit with no gaps around the edges, ensuring that all intake air is actually being routed through the media rather than bypassing it. One thing to note is that you might notice a very slight decrease in max fan velocity due to the increased density of the HEPA material, but the tradeoff for cleaner air is well worth it in my opinion. If you live in an area with high pollution or suffer from seasonal allergies, this is a legitimate quality-of-life improvement for your daily commute.
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Reviewed in the United States on February 26, 2026

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