Earl's Port Plug w/ O-Ring Seal -12 AN 2010173 MLS gaskets are ideal for

MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks

It eliminates the use of mini spools commonly used to lock the stock GM differential

Fits Pro Ratchet and Star Shifter

Dart Block

Transmission Cast Deep Pan

Earl's Port Plug w/ O-Ring Seal -12 AN 2010173 MLS gaskets are ideal forEarl's offers the most complete line of adapter fittings in the industry. In addition to the standard range of AN adapters in both aluminum and steel, over the past 30 years Earl's has designed and manufactured a wide selection of special adapter fittings to meet the needs of the racing industry. These specials include metric to AN, inverted flare to AN and power steering fittings. Product Description: Plug 12 AN O Ring Hex Head Aluminum Blue Anodized