This all aluminum ELECTRIC fan shroud is compatible with:<br><br>1957 Oldsmobile 88 6.1L 371ci V8 2" Upper - 3 1/8", Lower 2 1/2"<br>1957 - 1958 Oldsmobile 98 6.1L 371ci V8 <br>1958 Oldmobile Dynamic 6.1L 371ci V8 <br>1957 - 1958 Oldsmobile Fiesta 6.1L 371ci V8 <br>1957 Oldsmobile Golden Rocket 88 6.1L 371ci V8 <br>1957 Oldsmobile Starfire 6.1L 371ci V8 <br>1957 - 1958 Oldsmobile Super 88 6.1L 371ci V8<br><br>Fan Setup: 2 x 13 (Not Included)<br>Fans are SKU 241721<br>Wiring 221453<br><br>Core Size: 20 1/2" x 24" (mounts on side for downflow radiators)<br><br><br><br><font class="HiliteFONT">Suggested Add-Ons:</font><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>Two 10" Electric fans required for this shroud (<a href="http://www.radiatorexpress.com/product.asp?part_id=221448" target="_blank">SKU 221448</a>)