Engines and Components› Cylinder Heads and Components

Dart

BBCRACE20XCNC485CC2.420X1.800 BARE

$4,421.69

SKU: D00Q 19776090XS

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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

These Dart Pro 1 CNC Ported, 360 BBC Cylinder Heads are designed for high-performance Big Block Chevy (BBC) engine builds. Borowski Race Engines, a reseller, custom-machines these heads from porter castings on their own CNCs to achieve superior flow and horsepower compared to standard Dart machined heads. The port designs are continuously optimized. These assembled heads are available for both hydraulic and mechanical cam applications. The mechanical cam version features Dart Severe Duty stainless steel intake valves and Dart Inconel exhaust valves. The hydraulic cam version utilizes Manley Severe Duty valves. Both configurations include Manley spring kits with 10-degree hardened steel locks and titanium retainers.
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BBCRACE20XCNC485CC2.420X1.800 BARE

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Specifications

BrandDart
Part NumberD00Q 19776090XS

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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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