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Air and Fuel› Intake Manifolds and Components

Holley

105mm Mono-Blade Throttle Body

$800.00 $776.00 Save $24.00

SKU: 112-591

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Holley EFI 112-591 is a 105mm mono-blade throttle body designed for high-performance applications. It is constructed from lightweight billet aluminum and features a 4-inch V-band or dual O-ring flange. This throttle body includes roller bearing throttle shafts and a non-contact magnetic TPS sensor for ease of installation and tuning.
Show original supplier description
The Holley EFI 112-591 is a top-tier mono-blade throttle body engineered to maximize airflow for your engine's power plant. Featuring a substantial 105mm bore, this unit is designed for serious performance applications, including those with turbochargers or superchargers. Constructed from lightweight billet aluminum, this throttle body offers durability and performance. It utilizes roller bearing throttle shafts for smooth operation and a non-contact magnetic TPS sensor, derived from Pro Stock and ARCA technology, ensuring consistent throttle response. The throttle body is designed with an O-ring groove for a 100% airtight seal against the intake manifold. It also features adjustable idle and WOT stops, along with an indexable throttle lever to accommodate various installation needs. The 112-591 model is available with either a 4-inch V-band flange or dual O-ring connections, making it suitable for a wide range of applications. It has a 3.5-inch square bolt pattern and requires the use of a 4-inch Wiggins-style clamp.

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.

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Specifications

BrandHolley
Part Number112-591
CategoryAir and Fuel

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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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