SKU: 22991278380

Koyo Lightweight Aluminum Radiator - 88-91 Civic/CRX B-Series DOHC

$158.31 $175.90
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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

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Description

Koyo Lightweight Aluminum Radiator - 88-91 Civic/CRX B-Series DOHCKoyorad is proud to introduce an improved lightweight performance radiator for the 1988 1991 Honda Civic CRX swapped with B Series engines. Koyorad has engineered this TIG welded, all aluminum radiator with 43% less weight than Koyorad's original R Core version, yet remains 56% thicker than the factory radiator, resulting in improved performance while cutting unnecessary weight. Koyorad's high density Hypercore boosts the vehicle's heat capacity and

Koyorad is proud to introduce an improved lightweight performance radiator for the 1988-1991 Honda Civic/CRX swapped with B-Series engines. Koyorad has engineered this TIG welded, all-aluminum radiator with 43% less weight than Koyorad's original R-Core version, yet remains 56% thicker than the factory radiator, resulting in improved performance while cutting unnecessary weight. Koyorad's high density Hypercore boosts the vehicle's heat capacity and endurance while replacing aged factory radiators for improved tank strength and durability. OEM mounting provisions have been retained for an easy installation and can be used with factory fans, and accepts the larger 32mm B-Series radiator hoses. Koyorad's advanced engineering and design methods, impeccable TIG welds, proficient furnace brazing techniques, and triple pressure testing for quality has earned their excellent reputation in performance cooling worldwide.

Features:

  • High Density 25mm Hypercore
  • 43% Lighter than Koyorad R Series Core, 56% thicker core than OEM radiator
  • Compatible with B-Series 32mm Radiator hoses
  • Slim core footprint, increased space for other engine components, e.g. intercooler, oil cooler, etc.
  • All-aluminum, furnace brazed, and TIG welded construction
  • Triple Pressure tested for quality

Applications: '88-'91 Honda Civic /CRX EF Chassis with B-Series, manual transmission

Notes: 32mm inlet/outlet hoses for B-Series engines, Manual Transmission only.

*Images used for reference only

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: 22991278380

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4.7 ★★★★★
Based on 12 reviews
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Product Reviews
C
Verified Purchase
Charlie J
Omaha, US
★★★★★ 4
Good quality
Size: 10 sqft
I wish it was a little better but it definitely works great and look good for how cheap it is
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2026
R
Verified Purchase
R. Selberg
Cuba, US
★★★★★ 5
Works well
Size: 10 sqft
Worked great at a budget price. I used it to damp a fiberglass loudspeaker horn. Easy to work with too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
D
Verified Purchase
Devan
Grantham, US
★★★★★ 5
Good material but bites back
Size: 20 sqft
Very good product for my rear trunk and backseat on my mustang. I would recommend some type of gloves due to the foil itself when placing down will cut up your hands and fingers. Overall good product for its price.
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Reviewed in the United States on May 23, 2026
B
Verified Purchase
Bradley
Omaha, US
★★★★★ 5
Excellent product high quality.
Size: 36 sqft, Size: 36 sqft
This stuff definitely suprised how easy it was to work with. Not to mention it sticks very well. Don't put it on anything you may need to get back into. It will take the paint off of a service area. I have a 2018 dodge durango. I just had a aftermarket audio sytem installed. It was rattling so bad it was driving me crazy. I seen this stuff and decided to give it a try. Its a night and day difference no moore rattling. I box will be enough to do my back gate and all front and rear doors also. For the price you honestly can not beat it. If your on the fence about trying it don't be. You definitely won't regret getting it. Its worth every penny. You don't realize how much something rattling in your vehicle robs you of spund quality. Glad I made the decision. Now off to the other 4 doors. ,and then the roof. One of the things I really like was the fact it has multiple line to help you make even better cuts. Definitely will buy a gen.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
M
Verified Purchase
Mr. & Mrs. Us
Whiting, US
★★★★★ 5
Affordable, Clean and does the job.
Size: 36 sqft, Size: 36 sqft
I consumed about 90% of this box doing all doors and the tailgate on a 2000 tahoe. I applied it very liberally inside every door (exteror) panel. We then added an almost equal amount of deadening/absorbing/decoupling foam to the other side of the door (panel side). If you know how many rattles a circa 2000 tahoe GMT800 can have by now, you can appreciate why I added this as a "must" if i were to put some money back into this vehicle. Best sub $150 spent on this mini resto so far, right next to tint. Good quality. Not to thick or thin. Good sized sheets. Seamed to deaden as good as another slightly thicker material i recently used in my F250. My box was delivered with no issues of melting or anything funky. Clean, no major smell before or after and easy to work with. Maybe buy a roller set and wear gloves. Save your hands if your doing inside of panels. Good buy. Will buy more for future projects.
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Reviewed in the United States on February 17, 2026

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