Air and Fuel› Intake Manifolds and Components

Motordyne

1/2" Basic Plenum Intake Spacer

$331.50

SKU: MD-12B

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Motordyne 1/2" Basic Plenum Intake Spacer is a performance-enhancing component designed to improve airflow efficiency in the intake manifold. This stealth modification increases engine output and delivers a deeper exhaust growl while maintaining a factory-style appearance.
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The Motordyne 1/2" Basic Plenum Intake Spacer is an engineered solution for the 2003-2007 Infiniti G35 with the VQ35DE engine, designed to optimize intake plenum volume for improved performance. By increasing the intake capacity, this component helps generate measurable horsepower gains and provides a deeper, more aggressive engine note under load. Please note specific fitment caveats: while the engine cover is compatible with this spacer, it will not fit on coupe models. Additionally, the spacer is too large to fit the stock strut bar, meaning the strut bar must be removed during or after installation to clear the increased plenum height. Always ensure your specific vehicle configuration is compatible with these physical clearance limitations.

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

BrandMotordyne
Part NumberMD-12B
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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