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Add to Cart The item has been addedSinister Diesel
Sinister Diesel 2008-2010 Ford Powerstroke 6.4L Intercooler Charge Pipe Kit - SD-INTRPIPE-6.4-KIT
MSRP: $987.99$759.99 -
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Add to Cart The item has been addedSinister Diesel
Sinister Diesel 03-07 Ford 6.0L Powerstroke Hot Side Charge Pipe - SD-INTRPIPE-6.0-HOT
MSRP: $400.39$307.99 -
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Sinister Diesel 11-15 Chevy Duramax LML Intake Bridge - SD-INTEL-LML
MSRP: $597.99$459.99 -
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Sinister Diesel 99.5-03 Ford 7.3L Powerstroke Intake Elbow - SD-INTEL-7.3-BK
MSRP: $935.99$719.99 -
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Sinister Diesel 99-03 Ford 7.3L (w/ Integrated Fuel Filter) Regulated Fuel Return Kit - SD-FUELREG-7.3
MSRP: $1,468.99$1,129.99 -
Add to Cart The item has been addedSinister Diesel
Sinister Diesel Cold Air Intake 13-16 Chevy / GMC Duramax 6.6L LML - SD-CAI-LML-13
MSRP: $649.99$499.99
Premium Diesel Performance, Delivered Fast
Thousands of parts. Real customer service. Zero bullshit. Built for diesel enthusiasts by diesel enthusiasts.
Everything on our site shows live inventory from our warehouses.
If it’s in stock, you’ll see it. If it’s out of stock, it’ll be clearly marked — no surprises, no guessing.
Why Underworld Diesel?
The diesel world is packed with slow shipping, outdated sites, and customer service that disappears the second you hit “Place Order.” That's not how we operate.
We’re diesel people. Real trucks, real wrenching, real experience. We know what works, what fails, what’s junk, and what actually makes your rig run harder.
Everything on our site pulls from live inventory — if it shows **In Stock**, it’s ready to go. If it shows **Out of Stock**, that’s exactly what it is. Straight answers. Zero games. Zero bullshit.
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