Engines and Components› Cylinder Heads and Components

Trick Flow Specialties

GenX 255 Cylinder Heads

$1,674.99

SKU: TFS-3261T004-C01

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$100 Minimum Order
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Overview

The Trick Flow GenX 255 cylinder head is a cast aluminum, assembled performance cylinder head designed for GM LS3 engines. It features CNC-machined intake and exhaust runners with a 255cc volume and a 69cc combustion chamber. The head is equipped with dual valve springs capable of handling up to 0.650 in. of valve lift and titanium retainers.
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The Trick Flow Specialties GenX 255 cylinder heads are performance-oriented components engineered for GM LS3 engines. These heads are not a stock replacement and are specifically designed for LSX-based engines utilizing a 6-bolt configuration with a minimum bore diameter of 4.000 inches. Constructed with advanced features, these cylinder heads boast a 255cc intake runner volume and a 69cc CNC-machined combustion chamber. They come assembled with 450 lbs./in. dual valve springs, titanium retainers, and have a 2.165-inch intake valve diameter. The 6-bolt pattern ensures a secure and robust mounting. These heads include new rocker arm rail mounts for compatibility with OEM LS3 1.7 ratio rocker arms.

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

BrandTrick Flow Specialties
Part NumberTFS-3261T004-C01
CategoryEngines and Components
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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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