The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 454 Valve Steam Seals: Umbrella or Positive?

BigBlocksRule · 02-03-2012, 06:50 PM

I run positive (viton) on intakes, umbrellas on exhaust since it needs a bit better lubrication.

02-03-2012, 06:50 PM	#2
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: 454 Valve Steam Seals: Umbrella or Positive? I run positive (viton) on intakes, umbrellas on exhaust since it needs a bit better lubrication.