"Rolling coal and crushing souls." Boss Ross Diesel: unapologetically overboosted.

More boost, less excuses.

We don't chase horsepower, we drag it -- screaming out of your mill.

Built for torque, tuned for trouble.

From farm trucks to track monsters—we make 'em all spool happy.

Lift it, lock it, launch it—regret nothing.

Built to crawl over rocks, mall curbs optional.

Turning daily drivers into trail survivors—one questionable mod at a time.

We put the ‘overkill’ in overland. Boss HP —where mild upgrades go to die.

If it ain’t broke, you’re not pushing hard enough.

Built to tow your house, and scare your neighbors.

Making smoke signals since… well, since your last tune.

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99-06 GM 1500 EC SB 143.5 DOSS

Name: 99-06 GM 1500 EC SB 143.5 DOSS
Brand: Flowmaster (Holley)
SKU: FLM17395
Price: 499.95 USD
Availability: InStock

$499.95 USD

~~$562.95 USD~~ $499.95 USD

Sale Sold out

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Product	Product subtotal	Quantity	Price	Product subtotal
99-06 GM 1500 EC SB 143.5 DOSSFLM17395	99-06 GM 1500 EC SB 143.5 DOSSFLM17395 Regular price ~~$562.95~~ Sale price $499.95/ea	$0.00	Quantity	Regular price ~~$562.95~~ Sale price $499.95/ea	$0.00