Product Summary

Nodular Iron, Natural, Natural, Gasket(s) Included

  • Classic rams horn style exhaust manifold with a ground smooth appearance for great vintage looks
  • Features Corvette style 2-1/2-inch outlet for added flow and performance
  • Fits most Gen 1 small block Chevy heads with straight or angle plug design
  • Cast iron efficiency with the fitment of block-hugger style tube headers
  • Includes collector gaskets and mounting hardware for an easy installation
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Key Specs

MFG. Part #UP230442
BrandSpeedway Motors
FinishNatural
Collector Diameter2-1/2 Inch
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Need To Know

Ineligible for Return

Contains items that cannot be returned

Speedway Motors UP230442 Details

Garage Sale Product

This is Garage Sale priced due to the item missing 1 or more components. Please review the photos for what you are purchasing.

NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

  • Smooth exterior finish with no exposed brackets or bolt holes for a clean appearance
  • Fits most factory Gen 1 SBC heads including Vortec heads
  • Ample clearance for both straight and angled spark plug applications
  • 1-3/8-inch by 1-3/8-inch square port design can be port matched to your heads
  • Increased flow over stock manifolds and utilizes Corvette-style 2-1/2-inch 3-bolt collector
  • Nodular iron construction retains heat for efficiency and quieter than tubular headers
  • Design tucks collector close to block like a “block hugger” header
  • Includes fasteners, exhaust flange gaskets, and collector gaskets for installation
  • Raw surface finish can be painted or ceramic coated

Low Profile Exhaust Manifolds That Provide Great Clearance with A Classic Appearance

If you’ve spent any time at all installing tubular steel headers on a car you know what a pain in the backside they are. They often hang too low, hit your steering box, or must pass through your steering or clutch linkage, and don’t even get us started on blown out header gaskets and must constantly check and tighten header bolts. Are tubular headers worth the hassle? Many will say yes, and we will agree if the power level warrants it, or it is a custom set made for the exact chassis and engine combination (which often costs big money!). For most of us however, a good “block hugger” header will suffice. These header designs are known for being easier to install and have few drawbacks (except those often leaking header gaskets).

But even the block hugger header can look out of place in some builds, especially those early pre-war cars with open engine bays. You can give your small block Chevy the best of both worlds by using our smooth looking cast iron rams horn exhaust manifolds. These ram horn manifolds provide the same “block hugging” design while offering a period exhaust manifold look that fits right in. Not to mention the cast iron design has many benefits over the tubular steel header. Add in our high flow design with large 2-1/2-inch Corvette-style exhaust collector and it is easy to see how our Smoothie Rams Horn exhaust manifolds are hard to beat for the price, clearance, and great fit.

Fits Most Straight and Angle Plug Gen 1 Small Block Chevy Cylinder Heads

The factory cast iron SBC exhaust manifold will often have extra mounting holes/ears cast into it, either causing fitment issues or just plain ugly looking. Stock manifolds also are cast for specific chassis and engine combinations, again potentially causing fitment issues. Our Smoothie Rams Horn exhaust manifolds are designed from the start to fit most factory head castings, be they straight plug or angled plug, while providing greater flow and power production than the typical stock SBC exhaust manifold. With plenty of material around the 1-3/8-inch square exhaust flange port you can easily port match these to your heads for greater exhaust flow. The larger 2-1/2-inch Corvette style 3-bolt collector works with both flat gaskets and a 2-1/2-inch Corvette exhaust donut if you’re stock exhaust pipe flange requires them.

You can easily connect our rams horn manifolds to your existing exhaust via 2-1/2-inch 3-bolt flanges, or 2-1/2-inch to 2-inch 3-bolt reducers, depending on the diameter of your current exhaust system. This complete kit includes a pair of ramhorn manifolds, mounting hardware for the manifold and collector, exhaust flange gaskets, and collector gaskets. Everything you need to easily install your ram horn manifolds without the stress and frustration of trying to fit tubular headers. Plus, there’s no denying the ramhorn manifolds look so right on SBC powered hot rods and classic trucks. Choose from the raw finished manifolds offered here, or we also offer our rams horn manifolds in silver ceramic coat, black high-temp painted, and chrome plated versions as well.

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Speedway Motors UP230442 Specifications

KEY SPECS
MFG. Part #UP230442
BrandSpeedway Motors
FinishNatural
Collector Diameter2-1/2 Inch
GENERAL
Material TypeNodular Iron
ColorNatural
Flange StyleSquare Port
Gasket(s) IncludedYes
Inlet Size1-3/8-inch square port
Hardware IncludedYes
Sold in QuantityPair
NotesFitment issues with Tri-5 Chevy’s and 1935-1940 Fords with stock steering box
Header Dimension B5.30"
Header Dimension C18.50"
Header Dimension A4.03"

Questions & Answers

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