RM-4-OS Round Port Ram Air/HO/SD Style Factory Headers - Oversized

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$439.00

Quick Overview

Pair, (LH and RH) Ram Air Round Port Manifolds with Larger Collector (shown at right with gray ceramic coating)


Fits 68-79 GM A-body; 70 1/2-81 F-Body; 69-77 G-Body, 69-81 B-Body with these heads: RA II, RA IV, 455 HO, 455 SD, Edelbrock heads. Collector size is 2.45" for cars with "large pipe" exhaust systems and/or intake/head mods. The larger collector gives 14-16% more flow capability than stock collector castings. Lifetime warrantee on material and workmanship!


Manifolds are 455SD design (the largest Round Port design).
Original casting numbers on Manifolds: LH 490803, RH 490802 Exact Reproductions from GM blueprints.


RA IV casting numbers now available upon Request!


LH requires 2 bolt flange, RH requires 3 bolt flange (sold sererately)


GET $25.00 OFF WHEN YOU ORDER OUR X-CROSSOVER EXHAUST SYSTEM WITH OUR FACTORY HEADERS!


OPTIONAL CERAMIC COATING:

Castings are port matched to Pontiac Blueprint then thermal barrier ceramic coating is applied on interior and exterior. Choice of Silver or Gray. 3-year Guarantee. Will not burn off, fade or peel. Reduces header temperature 40%! Silver is chrome-like. Gray looks stock.



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$439.00

RM-4-OS Round Port Ram Air/HO/SD Style Factory Headers - Oversized

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Pair, (LH and RH) Ram Air Round Port Manifolds with Larger Collector (shown at right with gray ceramic coating)

Fits 68-79 GM A-body; 70 1/2-81 F-Body; 69-77 G-Body, 69-81 B-Body with these heads: RA II, RA IV, 455 HO, 455 SD, Edelbrock heads. Collector size is 2.45" for cars with "large pipe" exhaust systems and/or intake/head mods. The larger collector gives 14-16% more flow capability than stock collector castings. Lifetime warrantee on material and workmanship!

Manifolds are 455SD design (the largest Round Port design). Original casting numbers on Manifolds: LH 490803, RH 490802 Exact Reproductions from GM blueprints.

RA IV casting numbers now available upon Request!

LH requires 2 bolt flange, RH requires 3 bolt flange (sold sererately)

GET $25.00 OFF WHEN YOU ORDER OUR X-CROSSOVER EXHAUST SYSTEM WITH OUR FACTORY HEADERS!

OPTIONAL CERAMIC COATING:
Castings are port matched to Pontiac Blueprint then thermal barrier ceramic coating is applied on interior and exterior. Choice of Silver or Gray. 3-year Guarantee. Will not burn off, fade or peel. Reduces header temperature 40%! Silver is chrome-like. Gray looks stock.

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