2 1/2" outlets, Has provision to accept original generator and water tank type brackets on passenger side, Driver side includes OEM boss for expansion tank
Corvette-Style 2-1/2 Inch Ram Horn Exhaust Manifolds, Pair Speedway Motors
Corvette-Style 2-1/2 Inch Ram Horn Exhaust Manifolds, Pair
Sku # 9300328
Mfr. Part # 9300328
Condition
New
Brand
Speedway Motors
Sold
Pair
Details

These "rams horn" cast iron exhaust manifolds were patterned off the 1962-63 327 Corvette but are not OEM remanufactured manifolds (no casting numbers). They feature the big 2-1/2" diameter outlets and have provisions to accept original alternator type brackets. They are the perfect addition to a retro 327 style build: 365hp L76, 375hp L84, or 350hp L79 (all came with 2-1/2" outlets).

These Chevy ram horn manifolds are copies of the original1962-63 Corvette manifolds and can be used on almost any small block engine up to 1999. The cast in brackets are for the water tank on the drivers side and generator bracket on the passenger side. These can be cut off and smoothed per customers preference. These are a square port configuration with 1-5/16” top to bottom and also side to side. Compare to your head port size for compatibility.

  • Modeled after 1962-63 327 Corvette manifolds
  • Works on most small blocks up to 1999
  • 2-1/2" diameter outlets
  • 1-5/16" square ports
  • Use with 3 bolt header reducer/collector
  • Includes (1) left and (1) right side manifold
  • Gaskets included (manifold to cylinder head and outlet collector gaskets)
  • Manifold to cylinder head bolts/hardware and collector stud/hardware are included
Specs
Material Type
Cast Iron
Finish
Natural
Collector Diameter
2-1/2 Inch
Gasket(s) Included
Yes
MFG. Part #
9300328
Hardware Included
Yes
Sold in Quantity
Pair
Reviews

Good replacement part

Rated
Product Rating
by Low on July 16, 2025

Summary: I broke my left side original casting. Ordered these to replace. Well built and fit perfect. Probably better made than originals. They are original style castings in style and fitment. They are not number matching castings but that is not what I was looking for. Great price and value if bought as a pair with hardware. The short bolts to head were missing from hardware kit. Everything else was included.

Yes, I recommend this product.

Quality product

Rated
Product Rating
by Jackit on July 07, 2025

Summary: Manifold was the same dimensions as my stock manifold as was well made. the bolts that were included bottomed out in the head because they were about 1/2 inch too long. I was able to use the existing bolts for installation.

Yes, I recommend this product.

nice replacements

Rated
Product Rating
by chevelle on June 03, 2024

Summary: Installed on a 67 Chevelle 327. wanted something different. Instead of headers that you have to make clearances. 2 1/2" runners are just the same as block huggers.

Yes, I recommend this product.

I would buy it again

Rated
Product Rating
by Will on June 26, 2023

Summary: Brought this item for my 62 impala and it worked out great 👍.

Yes, I recommend this product.

Incredible product and great price !!!

Rated
Product Rating
by Tmac on June 22, 2023

Summary: Small block 350 crate

Yes, I recommend this product.

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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.