Engines and Components› Cylinder Heads and Components

Dart

ALUM18 BC PRO1 ASSM.2.40

$4,121.31

SKU: D00Q 18474136

Out of Stock
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

Dart Big Chief Cylinder Heads have dominated in sportsman classes since their introduction, and they have continued to improve the design with the latest Pro Stock technology. With their sophisticated CNC machining programs, they can tailor a pair of Big Chief heads to fit your exact engine combination. These 18 degree heads have what it takes to win, spread intake ports, shallow valve angles, efficient combustion chambers, raised exhaust runners, and a valvetrain that's reliable at high rpm. Huge 421cc intake runners maximize flow. These heads have as cast runners with CNC machined chambers and CNC blended bowls. Must use specific pistons, intake, and shaft rockers. Assemblies include 2.400"/1.900" stainless steel valves, 1.625" Vasco Jet springs, titanium retainers, and are ready to install.
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ALUM18 BC PRO1 ASSM.2.40

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

BrandDart
Part NumberD00Q 18474136

Videos

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David Freiburger's Quest for 1,000HP NA with Dart 582 BBC
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Sbc23 degree vs 18degree vs 13degree vs LS7
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MBE 18Degree Big Block Chevy Conventional Cylinder Head EXPLAINED ** TECH VIDEO **

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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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