Chevrolet lightweight aluminum crossflow radiator. Manufactured from genuine Alcoa aluminum (NOT recycled!). Dual 1" core, tig welded, furnace brazed (NO epoxy!) Billet (passenger side) filler neck and drain petcock. Chevrolet 28.25" x 18.625" Overall measurement. 1.50" upper (D/S) inlet, 1.75" lower (P/S) outlet.