Filler panels are made out of 18 gauge cold rolled steel and come just a tick larger than your stock door so they can be turned for that perfect fit. They also have a beveled edge so the weld area gets down below the surface of the cowl making it easier for flush fit. Instead of destroying your original cowl vent assembly, save it for the next swap meet and buy a Bitchin filler panel and pocket the difference; you will be time and money ahead.
** ALL "GARAGE SALE ITEMS"ARE ALL SALES FINAL - NO RETURNS OR REFUNDS. LIMITED QUANITIES **