This build features a HE = HIGH EFFICIENCY copper core. This design utilizes 1/2 tubes on 3/8 center to provide 20% more heat transfer points than a traditional core. In a nut shell, it will come in the same thickness as an OEM 3 row but provide the cooling capacity of a 4 row.<br><br>This 3-Row copper/brass SMALL BLOCK radiator mounts on the engine side of the core support. SMALL BLOCK V8<br><br>21 INCH CORE.<br><br>For Item will Fan Side mount, see other listing (bracketing recessed inward, see SKU 222130)<br><br>For a 23 inch wide core style, see SKU 220892<br><br>NOTE: can be used for 1957 w/ L6, if you change core support to V8.<br><br>Made in the USA<br><br>Copper Brass all metal original style radiator is built to order in the USA. Allow 4 week build time. Item will be made with automatic transmission. For manual, specify upon ordering.<br>Purchaser is required to match illustration, thickness and measurements prior to purchase to ensure fitment. Item sold as illustrated and described disclosing model information is added as a reference. Custom built items cannot be canceled mid build and are non returnable (12 month exchange warranty included)<br><br>Core Dimensions: 16 5/8 X 21 3/8 X 2<br>Overall Dimensions: 24 - 1/2 x 23 -3/4<br>Hose Locations: In-Center/ Out - Pass<br>Core Thickness: 2"<br>Tanks: <br>Rows: 3 ROW HIGH EFFICIENCY<br>Tank Construction: Brass<br>Core Construction: Copper<br>Inlet Diameter: 1 1/2<br>Outlet Diameter: 1 3/4<br>TOC: Yes <br>EOC: NA <br>Mount: OEM V8<br>Warranty 12 month<br><br><font class="HiliteFONT">Suggested Add-Ons:</font><br>Radiator Cap (<a href="http://www.radiatorexpress.com/product.asp?part_id=221633" target="_blank">SKU 221633</a>) <br>Thermostat Relay Kit (<a href="http://www.radiatorexpress.com/product.asp?part_id=221453" target="_blank">SKU 221453</a>) <br>Overflow Tank (<a href="http://www.radiatorexpress.com/category.asp?cat_id=R023" target="_blank">See Category</a>)<br>One 16" (<a href="http://www.radiatorexpress.com/product.asp?part_id=221446" target="_blank">SKU 221446</a>) or 2 x 10" (<a href="http://www.radiatorexpress.com/product.asp?part_id=221448" target="_blank">SKU 221448</a>) Electric fans recommended for this core size<br>Electric Fan Shroud Kits (<a href="http://www.radiatorexpress.com/category.asp?cat_id=R024" target="_blank">See Category</a>) for alternate mounting of fans<br><br>Copper 80's style core with 1/2" tubes on 3/8" centers. Increased cooling efficiency without modifications to car. 4 row High Efficiency offers more cooling efficiency than aluminum cores due to tubes on 3/8" centers. Copper/brass construction to ensure dependability.