Promaxx Performance

GM 6.5L Diesel Straight Cylinder Head

$538.00

SKU: 9100-6.5L

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The ProMaxx Performance "GM 6.5 DSL STRAIGHT NEW FULL" cylinder head (Part Number: CHE855N) is engineered as a direct replacement for your GM 6.5L diesel engine. Constructed from cast iron, this cylinder head utilizes a new casting with improved material thickness in areas prone to cracking, enhancing durability. It comes fully assembled with valves, valve seals, springs, retainers, and locks, ready for installation without the hassle of a core charge. This head features straight intake bolt holes and is typically found in GM 6.5 Diesel trucks. The product is sold individually. A note from the manufacturer indicates that standard heads typically use a 1-piece intake; customers are advised to confirm their vehicle's existing setup before ordering. While some sources indicate fitment for 1992-2002 GM 6.5L Diesel engines, one review specifically notes that this part will not fit a '98 Chevy K2500 Silverado, despite other information suggesting fitment for 1992-1998 Chevy K2500 Silverado models. Extreme caution is advised when verifying fitment for specific model years, especially around the 1998 model year. It is also important to note that some listings may inaccurately associate this head with Ford 6.0L Powerstroke applications; this part is exclusively for GM 6.5L Diesel engines.

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

BrandPromaxx Performance
Part Number9100-6.5L
CategoryEngines and Components

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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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