Weiand Hi-Ram Intake - Chevy Big Block V8 - 1981

Hi-Ram Intake Manifold 396ci-502ci with Performance Oval Port Heads

Part Number: 1981

HI-RAM SERIES: These tunnel ram manifolds are used primarily in drag racing, tractor/truck pulls and performance We support all areas of the vintage, show, and nostalgia car hobby, and want to continue to produce these lower volume manifolds using the original tools. There is no need to search for that vintage intake at swap meets or on the internet when you can buy the real deal new from Weiand! This manifold is part of the Weiand Nostalgia Series of intake manifolds. Weiand Nostalgia Series intake manifolds are made using the original tooling, and may have minor appearance imperfections that do not affect the functionality of the part. These minor blemishes are a natural part of the casting process when using the original sand casting tooling. marine applications where high RPM performance is required. The effective RPM range is between Weiand Nostalgia series intakes are proudly cast and machined in the USA. 2,800 to 8,000 RPM. The WEIAND Hi-Ram, with it's patented D-shaped port runners and large plenum chamber, provides optimum velocity of the air/fuel mixture to the cylinder head intake ports. For maximum performance in a naturally aspirated competition application, the WEIAND Hi-Ram is the manifold of choice! This manifold is designed to be used with performance oval port heads. If you are not satisfied with a Nostalgia Series intake, we will gladly exchange it or refund your money. Our tech service representatives can be reached at 1-866-464-6553.

Features and Benefits

• 2500-7800 RPM power band
• Height: Front 10.12", Rear 10.93"
• Weiand Nostalgia Series Intake Manifold
• Power band: 2800-8000 RPM
• Large volume plenum
• Special D-shaped port runner design
• Carb Flange Center-To Center 9-11/16"
• Port Size: 1.82” height 1.60" width
• 2 x 4 carburetor top
• Square flange carburetor mounting

GM HEI will not clear, Use Side-by-Side 2 x 4 Tunnel Ram Carburetor Linkage Kit # 4022. When using carburetors with vaccum operated secondaries, use Diaphragm Housing Covers # 20-28, for more even and balanced secondary operation.Will fit tall blocks with use of Weiand P/N 8206 manifold spacer plate kit.