This listing is for a set of our 350JR manifolds that are ceramic coated for a low additional cost of $125; cost of manifolds $299 plus $125 for ceramic coating, total for the pair of ceramic coated manifolds is $424

Manifolds are ceramic coated in our shop in Quakertown, PA using a Cast Iron Grey for that natural cast iron appearance.  Our ceramic coating can withstand extreme temperatures up to 1200 degrees F without discoloring so it makes an ideal coating for exhaust and provides a superior protection against corrosion.  We apply an application of 1.0 to 2.0 mil film thickness of coating.

This is a high performance exhaust manifold that GM never produced. We have produced what everybody was asking for. This is the high performance solution instead of headers. 

Features:

• Large 2 1/4" outlet on the driver side manifold (original stock manifold is 2")
• No crossover pipe hole to plug on the passenger side
• Divided center port design
• Larger design for better air flow
• Direct bolt on with no modifications needed

These manifolds were conformed from the 1970 455 W30 manifold and custom fit to the small block for all proper clearances.

They will fit 1964 to 1988 small block Oldsmobile 307, 330, 350, 403. Will fit all GM A body cars, G body cars, F body Trans Am with a 403 and 1971 and newer B and C body cars.

SMALL BLOCK HEADERS ARE IN STOCK!!! LOOK FOR OUR LISTING ON EBAY

Please check out our other listings, we combine shipping

Feel free contact us for a shipping quote

THORNTON REPRODUCTIONS

832 MINE ROAD 

QUAKERTOWN, PA 19844