Why Upgrade to an Edelbrock Performer Intake on Your Pontiac 455

The Pontiac 455 is a legendary big-block engine, known for its torquey low-end and mid-range power. However, the factory iron intake manifold often chokes airflow, especially at higher RPMs. The Edelbrock Performer intake manifold is a direct-fit aluminum upgrade designed specifically for Pontiac V8s. It improves air and fuel flow, reduces weight by roughly 20 pounds, and provides noticeable gains in throttle response and horsepower—without sacrificing low-end torque. This guide walks you through the complete installation, from prep to first startup, ensuring you get the most from your upgrade.

Tools and Materials Needed

Before you start, gather everything in one place. Using the correct tools prevents damage to the manifold and engine.

  • Edelbrock Performer Intake manifold (part #2156 for standard port, #2716 for round port heads)
  • Quality intake manifold gasket set (Fel-Pro or similar, with metal carrier rings)
  • Torque wrench (1/4-inch and 3/8-inch drive, capable of reading in lb-ft)
  • Full socket and ratchet set (metric and standard sizes; 3/8-inch, 1/2-inch, and extensions)
  • Engine assembly lubricant or anti-seize compound
  • Gasket scraper or razor blade and brake cleaner for surface prep
  • Clean, lint-free rags
  • Pontiac 455 factory service manual or Edelbrock instruction sheet
  • RTV silicone (high-temp, oil-resistant)
  • Shop vacuum to clean out debris

Preparation: Set Yourself Up for Success

Start with a clean, well-lit workspace. Disconnect the negative battery cable—this prevents accidental shorts and protects the ECU if your car has one. Drain the coolant from the block and radiator at the petcocks; you don’t want coolant spilling into the valley. Remove the air cleaner assembly, carburetor, throttle linkage, and all vacuum lines. Label the vacuum lines with tape and a marker for reinstallation. Lastly, remove the distributor (mark its position relative to the block) and the coils or ignition module if they are mounted to the intake. With the top of the engine clear, you’re ready to pull the old manifold.

Removing the Factory Intake Manifold

Unbolt the intake manifold using a socket and ratchet. Pontiac intakes use a specific bolt pattern—work in reverse of the torque sequence to avoid warping the manifold. Remove all bolts and carefully lift the iron manifold straight up. It’s heavy, so get help if needed. Once off, scrape away all old gasket material from the block surfaces and heads. Use a gasket scraper and brake cleaner; be careful not to gouge the aluminum heads or iron block. Vacuum out any debris from the lifter valley. Wipe the surfaces with a clean rag so they are oil-free.

Installing the Edelbrock Performer Intake

With the block clean, follow these steps precisely. The Edelbrock Performer is designed to drop in with no modifications, but attention to detail is critical.

Gasket Placement and Sealing

Install the intake manifold gaskets. Use a thin bead of RTV silicone at the junction of the block and the timing cover (front and rear) where the intake meets the valley. The factory Pontiac service manual recommends this to prevent oil leaks. Lay the gaskets in place—align the bolt holes and port openings. Do not apply RTV to the entire gasket; only the four corners where the intake contacts the china walls.

Manifold Installation

Apply engine assembly lubricant or anti-seize to the threads of the intake bolts. This ensures accurate torque readings and prevents galling. Carefully lower the Edelbrock Performer intake onto the gaskets. Wiggle it gently to seat it. Install all bolts finger-tight. Then, using a torque wrench, tighten them in the sequence specified by Edelbrock (typically working from the center outward in three progressive steps). The standard torque is 25–35 lb-ft for the intake bolts, but confirm with the included instructions.

Reconnecting Accessories

Now that the manifold is torqued, reinstall everything you removed:

  • Distributor: Install it with the rotor pointing at the #1 terminal. Engage the oil pump drive correctly.
  • Carburetor: Use a new gasket. Torque the carb mounting nuts evenly to avoid base warping.
  • Throttle linkage: Adjust the cable or rod to provide full throttle opening without binding.
  • Vacuum lines: Reconnect to the correct sources—manifold vacuum to the brake booster, ported vacuum to the distributor advance.
  • Air cleaner: Ensure the new intake provides clearance for your air cleaner base.

Final Checks and First Startup

Double-check every bolt, hose, and wire. Refill the cooling system with the correct 50/50 mix. Reconnect the battery. Prime the oil system by cranking the engine with the ignition disabled until oil pressure registers. Then start the engine. Let it idle and watch for leaks at the intake gaskets and coolant passages. Listen for vacuum leaks (hissing sounds). Check the timing with a light and set it per your cam or factory specs. Test drive gently, then re-torque the intake bolts after a few heat cycles (cold engine).

Tuning Tips for Maximum Performance

The Edelbrock Performer intake works best with a matching carburetor—typically a 750 or 800 CFM unit. If you retained the stock Quadrajet, verify that the secondary metering rods and hanger are calibrated for the improved flow. A slight jet change may be necessary. Also, because the aluminum dissipates heat faster than iron, you might notice a richer cold-start mixture; adjust the choke setting accordingly. For more tuning guidance, refer to Edelbrock’s tech support page.

Common Mistakes to Avoid

  • Overtorquing bolts: Can crack the manifold or distort the gasket. Use a torque wrench.
  • Incorrect gasket selection: Pontiac heads come in standard and round port versions—match the gasket to your heads. See Fel-Pro’s intake gasket guide for details.
  • Skipping the RTV at the china walls: This is the number one cause of oil leaks.
  • Not marking the distributor: Reinstalling it incorrectly leads to a frustrating no-start.

Conclusion

Installing an Edelbrock Performer intake on your Pontiac 455 is one of the most effective bolt-on upgrades for broadening the powerband. The aluminum manifold reduces weight, improves airflow, and pairs perfectly with a mild cam and headers. By following this step-by-step guide, using the correct tools, and paying attention to sealing details, you’ll enjoy a reliable, leak-free installation that transforms how your big-block performs. For additional Pontiac-specific build tips, check resources like Pontiac Street Performance or the Hot Rod magazine test of the Performer on a 455. Now get under the hood and feel the difference.