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Find Exhaust Accessories for your Corvette

Exhaust Manifold Heat Riser with 2-1/2-Inch Headpipe (65-74 Big Block V8 Corvette C2 & C3)Find parts that fit my vehicle

Item EK-25-929692
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$94.99 each

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      Product Information

      Features, Description, Q&A, Specs & Installation

      Features

      • Exhaust Manifold Heat Riser
      • Includes a 2-1/2-Inch Headpipe without Valve
      • Raw Metal Finish
      • OE Compatible and Comparable
      • Improved Flow
      • Reproduction Part
      • Direct Replacement
      • Comes in Singles
      • Fits 1965-1974 Big Block V8 Chevrolet Corvette C2 and C3 Models

      Description

      Factory-Style Performance. The Exhaust Manifold Heat Riser restores period-correct function and appearance while promoting cleaner exhaust routing for 1965-1974 Big Block V8 Chevrolet Corvette C2 and C3 models. Purpose-built as a direct replacement, this reproduction part is engineered to deliver improved flow versus tired originals, helping reduce restriction and heat soak at the manifold outlet. It’s a smart refresh that preserves the character of classic powertrains while supporting smooth drivability and reliable warm-up behavior.

      Construction and Appearance. Featuring a raw metal finish, the assembly presents an authentic, workshop-fresh look that pairs naturally with vintage cast-iron hardware. The included 2-1/2-inch headpipe arrives without a valve for an unobstructed passage, reducing turbulence at the critical transition. OE compatible and comparable geometry maintains proper alignment at the flange and downpipe interface, while tight, reproduction-grade tolerances support gas sealing and long-term durability. The straightforward design emphasizes flow and fit without unnecessary complexity.

      Installation. Designed for direct replacement, the component interfaces cleanly with existing exhaust hardware for a straightforward, adaptable install using common shop tools. Support the system, loosen aged fasteners methodically, and transfer gaskets or replace as needed to ensure a secure, leak-resistant joint. Finalize by aligning the headpipe, tightening hardware evenly from the manifold outward, and verifying clearance to surrounding components to prevent rattles and heat-related contact.

      Application. This Exhaust Manifold Heat Riser fits 1965-1974 Big Block V8 Chevrolet Corvette C2 and C3 models. It enhances exhaust efficiency and authenticity, offering cleaner gas evacuation and a crisp, period-correct look that complements restored or well-preserved engine bays.

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Installation & What's in the Box

      Installation Info

      Installation Time

      (approx) 1 Hour

      Difficulty Level:

      Mechanical expertise or professional installation required.

      Installation Guides

        No guide available for this part yet.

      What's in the Box

      • (1) Exhaust Manifold Heat Riser

      Questions & Answers

      No questions about this product yet. Ask the First Question

      Will It Fit My Corvette

      • Base - 65, 66, 67, 68, 69, 70, 71, 72, 73, 74