The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - AR WTB Heat Shield and Riser Tube for SBC

**Chevy Fan Always** · 04-23-2020, 11:08 PM

The ones with the two large holes I think were for the bosses on the manifolds that could be used for A.I.R. injection (smog) trucks.

04-23-2020, 11:08 PM	#12
Chevy Fan Always Registered User Join Date: May 2015 Location: Ashland, Ohio Posts: 579	Re: WTB Heat Shield and Riser Tube for SBC The ones with the two large holes I think were for the bosses on the manifolds that could be used for A.I.R. injection (smog) trucks. Last edited by Chevy Fan Always; 04-23-2020 at 11:14 PM. Reason: info