Kustom Truck Parts offers a complete selection of truck assembly parts to simplify your build or repair. From fittings and brackets to wiring and connectors, each piece is designed for heavy-duty reliability and perfect fitment. Our engineered components help streamline complex installations while maintaining professional-grade performance. Explore our assembly parts to finish your project with precision and ease. Build smarter—choose Kustom Truck Parts for dependable assembly components.
Assembly parts from Kustom Truck are essential for interfacing a replacement engine (or the transmission) with your truck's existing chassis. We take the approach that you have a truck with an empty engine compartment.
These components, such as engine harnesses, mounting brackets, piping kits (including CAC, radiator, and intake adapters), and related engine upfit products—ensure proper alignment, secure mounting, electrical communication, and fluid routing between the engine/transmission and the factory chassis systems.
They address key challenges in conversions and swaps by providing direct-fit solutions that maintain correct geometry, enable seamless engine control integration, and prevent common issues like fitment mismatches, clearance problems, wiring/communication errors, or improper connections.
With these parts, your build achieves a clean, reliable integration that looks and performs like it was factory-intended, without the need for extensive custom fabrication.
Are assembly parts sold individually or as part of kits?
Assembly parts from Kustom Truck are sold both individually and as complete kits, depending on the specific SKU and application. Many components, like individual mounting brackets, engine harnesses, or single charge air cooler (CAC) tubes, are available as standalone items for targeted replacements, repairs, or partial builds.
Other SKUs are offered as bundled kits (such as full RAD and CAC piping kits for specific trucks and engine families) that include multiple coordinated pieces—e.g., left/right CAC tubes and upper/lower radiator tubes—under one part number for seamless compatibility in engine conversions or upfits.
We do not break apart kits to sell individual components from a bundled set separately; if you need just one piece from a kit configuration, look for it as its own standalone SKU (when available). This approach lets you buy exactly what's needed—whether a single part for a quick fix or a complete kit to ensure everything interfaces properly with your chassis without missing items or fitment issues.
For help choosing between individual parts and kits for your build, share your truck/engine details with our team.
Do assembly parts affect vehicle reliability?
Yes, assembly parts from Kustom Truck play a critical role in the long-term reliability of your heavy-duty truck build, particularly in engine conversions or upfits where the replacement engine interfaces with the existing chassis.
Direct-fit components like engine harnesses ensure 100% compatibility between the new engine's ECM electronics and the factory chassis wiring, preventing fault codes, warning lights, dash malfunctions, or intermittent electrical issues that can arise from poor electronic interface.
Mounting brackets, piping kits (CAC, radiator, intake adapters), and related upfit hardware are engineered for precise alignment and secure bolt-on installation, avoiding common reliability killers such as cracked piping from misalignment, poor welds or bracket failures under torque/load, engine upfit incompatibilities, or fluid leaks due to improper routing and fitment.
By using quality, direct-fit assembly parts designed specifically for the demands of heavy-duty operation, you maintain proper geometry, seamless engine control integration, and overall system integrity, helping minimize downtime without introducing new weak points.
How readily available are the assembly parts?
Assembly parts from Kustom Truck are generally highly available and ready to ship quickly, thanks to our dedicated 10,000 sq/ft warehouse in Coos Bay, Oregon, where we maintain a substantial in-stock inventory of engine harnesses, mounting brackets, piping kits (CAC, radiator, intake adapters), and engine upfit components. We ship orders daily, with most in-stock items going out the same day if ordered before our 12pm PST cutoff. High-turnover items are restocked regularly to keep popular SKUs on the shelf.
In the occasional case where a specific part is temporarily out of stock at the time of your order, we offer partial shipping of the in-stock products and follow up with the backordered item(s) typically within 1-2 weeks once restocked. Extended delays are rare and usually tied to extreme supply chain situations for certain specialized pieces. If availability is a concern, contact our sales team before finalizing your purchase so you know the status of a specific product.
