If you’re looking to crank up the power in your ride, check out the Texas Speed & Performance 408 C.I.D. LQ9 short-block. This isn’t just any engine; it’s built on a solid foundation with a brand-new GM LQ9 6.0L iron block. You’ll get a fully-assembled short-block that comes with a 4.00" stroke crankshaft, and you can choose between a 24X or 58X reluctor wheel based on your setup.

When it comes to pistons, you’ve got options. Pick from Wiseco, CP Pistons, Diamond Racing, or Mahle. All of these use a tough 2618 forging and come with a proprietary ring set, designed to fit into a 4.03" bore unless you specify otherwise. And if you’re dreaming of a custom build, we’ve got your back with various connecting rods and crankshafts to match whatever you’re aiming for.

Now, if you’re planning to run some serious nitrous or boost, consider upgrading to the 1/2" head studs. This upgrade includes ARP hardware and the necessary machine work, and it’s a solid choice if you want to push your engine to the limit. Plus, the PRC aftermarket casting cylinder heads come prepped with the larger bolt holes you’ll need for those head studs.

For those who want a complete package, we also offer turn-key long-blocks. These come with your choice of oil pan, intake manifold, throttle body—you name it. Want to customize? We have plenty of upgrades available, like ARP bolts and studs, Cometic head gaskets, and more. Just give us a shout, and we’ll whip up an itemized estimate tailored to your needs.

The Gen III block we use is similar to the LS1/LS6, so it’ll fit right in with all the necessary LS1 covers, gaskets, and components. Just a heads-up, though: it uses LS2/LS3 cylinder head bolts. Build time can vary depending on parts availability, so don’t hesitate to reach out for more info.

One of the best things about our TSP engines? They come with 12 quarts of break-in oil at no extra charge. Proper break-in is crucial for your engine, helping ensure the rings seal correctly against the cylinder walls right from the start. A lot of off-the-shelf oils don’t have the ZDDP additives you need for a new engine, so we want to make sure you get it right. Once you’ve completed the break-in, we recommend switching to Driven Racing oil, specifically the HR2 conventional non-synthetic.

Features:

• Our TSP 408 C.I.D. long-block includes everything in our short-block package, plus:
• Precision Race Components (PRC) As-Cast 225cc Cathedral Port Cylinder Heads with TSP Dual Valve Spring Kit
• Your choice of TSP Camshaft
• LS2-Specific Timing Set
• Johnson 2110R Lifters
• TSP Hardened Chromemoly Pushrods
• GM Cylinder Head Bolts & GM MLS Head Gaskets
• GM High Performance Oil Pump
• All necessary bolts, gaskets, and GM items included

Fitment:

• Cadillac CTS-V 2004-2007
• Cadillac Escalade 2005-2014
• Chevrolet Camaro 1998-2015
• Chevrolet Corvette 1997-2013
• Chevrolet Silverado 1500 1999-2013
• Chevrolet SS 2014-2017
• Chevrolet Suburban 2000-2014
• Chevrolet Tahoe 2000-2014
• Chevrolet Trailblazer 2006-2009
• GMC Sierra 1500 1999-2013
• GMC Yukon 1999-2014
• Pontiac Firebird 1998-2002
• Pontiac G8 2008-2009
• Pontiac GTO 2004-2006
• Universal Retrofit 1997-2016

Note:

• Competition Use Only, Not Legal for Road Use
• Uses A Gen III Block