If you're diving into the world of high-performance engines, you might want to check out the Gen 4 resleeved aluminum GM engine block from Texas Speed & Performance. This isn't just another engine block; it's a serious piece of engineering designed for those who push their rides to the limit. We’re talking about American-made dry sleeves from Power Bore and Darton, carefully machined and installed right here in our facility using top-notch CNC equipment.

What sets this block apart? First off, both sleeve brands have a unique step design that keeps them securely in place. No one wants to deal with a sleeve that drops, especially when you’re cranking up the boost or running nitrous. With bore sizes ranging from 4.00" to 4.185", you’ve got plenty of room to play around with your build. These sleeves boast a much higher tensile strength than the standard GM options, and they’re thicker, which means they can handle the heat and pressure without distorting.

Now, if you’ve ever dealt with LS3 or LSA blocks, you know they come with those notoriously thin sleeves. That’s where this resleeved option shines. It’s perfect for anyone looking to build something that can take on serious horsepower without the risk of failure. And let’s not forget about the LS7 block—it’s known for those brittle sleeves that tend to crack under stress. Resleeving before you hit that breaking point can save you a lot of headaches and cash in the long run.

Just a heads up, this resleeving service is limited to Gen 4 LS and Gen 5 LT aluminum blocks. If you’ve got a Gen 3, you’re out of luck. And while we can help you get your block ready for some serious power, we don’t recommend going over a 4.125” bore size with any power adders. When you order, you’ll get the block with all necessary machine work done, but if you want it fully prepped and ready to assemble, make sure to select that option.

Thinking about adding cam bearings, cylinder boring, honing, or line honing? You’ll need to either grab a crankshaft from us or send in your own for proper measurement. We don’t take chances with measurements you provide; accuracy is key here.

Features:

• Designed to handle builds over 900+ HP
• Utilizes advanced 5.850" length Power Bore or Darton dry sleeves
• Step design prevents sleeve movement
• OEM GM main caps for reliability
• Bore sizes from 4.000" to 4.185"
• All blocks are new GM LS3 cores
• Options to add ARP main stud kit, cam bearings, cylinder boring & honing, line honing, and finish decking

Fitment:

• Cadillac CTS-V 2004-2015
• Cadillac Escalade 2005-2014
• Chevrolet Camaro 1998-2015
• Chevrolet Corvette 1997-2013
• Chevrolet Silverado 1500 1999-2013
• Chevrolet Suburban 2000-2014
• Chevrolet SS 2014-2017
• 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:

• Power Bore sleeves are not available below a 4.07" bore size