Life time Warranty
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  • Direct fit for the 2006–2011 Honda Civic Si w/ K-series engine
  • Full aluminium construction with durable TIG-welded end tanks
  • Features a two-row, 1.57" thick brazed aluminium core which provides efficient fluid temperature regulation on the street and track
  • Polished end tanks provide a stylish upgrade to your engine bay
  • Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system
  • Mishimoto Lifetime Warranty


A Mishimoto performance aluminium radiator is the ideal upgrade to the stock Civic radiator. For a cooler more efficient running engine, all Mishimoto radiators are designed and engineered to maximize cooling, boost engine functions, and most importantly prevent your car from overheating. Made with 100% brazed aluminium and polished end tanks, this lightweight two row core radiator will enhance the overall performance and lifetime of your engine. This aluminium radiator, like all Mishimoto radiators, is backed by our unparalleled Mishimoto Lifetime Warranty. Check out the 2006–2011 Civic Si hose kit, for even greater cooling efficiency.

Purchase Includes

Mishimoto Radiator
Magnetic Drain Plug
Mishimoto Lifetime Warranty
More Information
Overall Height (in)26.8
Overall Length (in)18.2
Overall Width (in)2.07
Core Length (in)14.72
Core Height (in)26.32
Fluid Capacity (gal)2.03
Inlet (in)1.25
Outlet (in)1.25
Core Thickness (in)1.57
Drain Plug Thread SizeM12 x 1.5
Applications2006-2011 Honda Civic Si
2008 Honda Civic Si Mugen Edition
Engine CodesK20z3
Chassis CodesFG1FG2FA1FA5
Coolant Capacity2.03

Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.