Air and Fuel› Intake Manifolds and Components

Weiand

Dual-Plane Low-Rise Intake Manifold

$314.95

SKU: WND8121

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Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The Weiand 8121 is a dual-plane intake manifold designed for street and strip use. It features a low-rise design for maximum torque and a satin finish. This manifold is made using a permanent mold casting process and is fully CNC machined for a precise fit. It is compatible with square bore carburetors and offers an exhaust crossover for improved street drivability.
Show original supplier description
The Weiand 8121 Street Warrior intake manifold is engineered to enhance torque and performance for street and strip applications. Its low-rise, dual-plane design promotes optimal airflow and is crafted using a permanent mold casting process for a lighter, smoother, and more consistent product. The manifold is fully CNC machined, ensuring a perfect fit and reliable operation. This intake manifold features a square bore carburetor flange and a Non-EGR design. It is optimized for a power band ranging from idle to 5500 RPM, with port sizes measuring 2.00 inches in height and 1.06 inches in width. The front height is 3.375 inches, and the rear height is 4.50 inches. It is designed to utilize stock GM gasket part numbers 89017465, MS90131, or the Fel-Pro 1255 gasket. Weiand claims this manifold is dyno-proven to deliver up to 25hp over competing products. The product comes with a satin finish and is sold individually.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandWeiand
Part NumberWND8121
CategoryAir and Fuel
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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