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SBC Header Flanges
RMRE manufactures several header flanges for both small block and big block Chevrolet cylinder heads. These flanges are CNC machined from 5/16" thick mild steel to provide a proper fit. They are available for several different SBC heads and various primary tube sizes for use with and without adapter plates Racers switching from standard SBC heads to say 18º SBC cylinder heads can save their old headers. You simply cut off your old flanges and weld the RMRE 18º flanges to your old headers.
	18º SBC w/o Adapter Plates
	18º SBC w/ Adapter Plates Click Here for Dims
	SBC Canted (Splayed Valve) Click Here for Dims
	Standard BBC Click Here for Dims
#913-306 1-3/4" Header Flange for 18º SBC w/o Adapter Plates #913-406 1-3/4" Header Flange for 18º SBC w/Adapter Plates #913-407 1-7/8" Header Flange for 18º SBC w/Adapter Plates #913-408 2" Header Flange for 18º SBC w/Adapter Plates #913-401 2-1/8" Header Flange for 18º SBC w/Adapter Plates #916-307 1-7/8" Header Flange for SB2 w/o Adapter Plates (Not shown) #917-401 2-1/8" Header Flange for Splayed (Canted Valve) SBC #917-402 2-1/4" Header Flange for Splayed (Canted Valve) SBC #917-403 2-3/8" Header Flange for Splayed (Canted Valve) SBC
BBC Header Flanges
The holes for the primary tubes on our BBC header flanges are machined on a biased angle so the tubes are angled upward. This matches the exit angle of the exhaust ports to improve axhaust flow. #923-301 2-1/8" Header Flange for Standard BBC #923-302 2-1/4" Header Flange for Standard BBC #923-303 2-3/8" Header Flange for Standard BBC
18º & Splayed (Canted Valve) SBC Header Adapter Plates
Small block Chevrolet 18º & Splayed Valve cylinder heads suffer from short exhaust ports. Once these 1/2" thick aluminum adapter plates are bolted in place you can port them to match you exhaust ports there-by increasing their length and improving performance. The bolts that attach the plates are flush mounted into recessed holes. This and the staggered bolts pattern of our header flange provide increased clearance when using larger diameter primary tube headers. Note also that the bolt pattern for our adapter plates provide more clearance for the spark plugs and greater support for hanging the headers. (i.e. Note center plates have two holes at the top for greater support and one hole at the bottom).
#913-100 18º SBC Header Adapter Plates Click Here for Dims #917-100 Splayed (Canted Valve) SBC Header Adapter Plates Click Here for Dims
Header (Exhaust) Gaskets
Reher-Morrison stocks exhausts gaskets for the above header flanges: 712-458 Exhaust gaskets SBC SB2 cylinder heads 712-457 Exhaust gaskets SBC Splayed Valve cylinder heads 712-456 Exhaust gaskets 18º SBC cylinder heads with adapter plates 722-455 Exhaust gaskets 18º SBC cylinder heads without adapter plates 722-450 Exhaust gaskets BBC 2.15" Dia. Round port large race 722-451 Exhaust gaskets BBC 2.40" Dia. Round port Chevrolet, Pontiac, Oldsmobile 4.840" bore center W/BB Chevrolet bolt pattern