The Texas Speed 427ci Dart LS Next Iron Short Block is an assembled short block built on the Dart LS Next iron block with 6-bolt mains. It carries a TSP 58x forged crankshaft with a 4.00" stroke, TSP 4340 steel 6.125" I-beam connecting rods and TSP/Wiseco 4.125" forged pistons with upgraded wrist pins. An ARP main stud kit secures the mains and upgraded 1/2" head studs are included.
Texas Speed rates this short block for up to 1200 horsepower and aims it at high-performance street builds, drag racing and road course cars. Choose between the -4cc piston for a higher compression naturally aspirated combination or the -13cc piston for lower compression with boost or pump gas. Final compression ratio depends on the cylinder heads and head gaskets used. This kit SKU ships with twelve quarts of Royal Purple 10W30 break-in oil, a Texas Speed LS engine stand and a shipping crate.
Specifications
- Displacement: 427 cubic inches
- Block: Dart LS Next iron block, 6-bolt main configuration
- Crankshaft: TSP forged, 4.00" stroke, 58x reluctor
- Connecting rods: TSP 4340 steel I-beam, 6.125"
- Pistons: TSP/Wiseco forged, 4.125" bore, -4cc or -13cc (selected at ordering), upgraded wrist pins
- Main hardware: ARP main stud kit
- Head studs: Upgraded 1/2" head studs included
- Horsepower rating per Texas Speed: up to 1200 HP
- Applications per Texas Speed: High-performance street, drag racing, road course
- Included with this kit: Royal Purple 10W30 break-in oil (12), TSP LS engine stand, short block shipping crate
Kit Includes
- Texas Speed 427ci Dart LS Next iron 6-bolt short block with 1/2" head studs (piston selected at ordering)
- Royal Purple 10W30 break-in oil, qty 12 (RYP-11487)
- Texas Speed LS engine stand with 3/8" drilled holes (TSP-Cradle)
- Engine crate for short block assembly (TSP-SDCrateSB)
Ordering Options
Select the Piston option when ordering: -4cc pistons (TSP-DART4271200HP-4-STD) or -13cc pistons (TSP-DART4271200HP-13-STD). Both versions use the same block, crankshaft, rods and hardware.
Vehicle Applications
Built for Gen III and Gen IV LS based combinations. Vehicle list reflects the fitment published by Texas Speed for this short block; confirm the rest of the build is compatible with a 58x crankshaft and the Dart LS Next block before ordering.
Chevrolet Camaro
- 1998 Chevrolet Camaro
- 1999 Chevrolet Camaro
- 2000 Chevrolet Camaro
- 2001 Chevrolet Camaro
- 2002 Chevrolet Camaro
- 2010 Chevrolet Camaro
- 2011 Chevrolet Camaro
- 2012 Chevrolet Camaro
- 2013 Chevrolet Camaro
- 2014 Chevrolet Camaro
- 2015 Chevrolet Camaro
Chevrolet Corvette
- 1997 Chevrolet Corvette
- 1998 Chevrolet Corvette
- 1999 Chevrolet Corvette
- 2000 Chevrolet Corvette
- 2001 Chevrolet Corvette
- 2002 Chevrolet Corvette
- 2003 Chevrolet Corvette
- 2004 Chevrolet Corvette
- 2005 Chevrolet Corvette
- 2006 Chevrolet Corvette
- 2007 Chevrolet Corvette
- 2008 Chevrolet Corvette
- 2009 Chevrolet Corvette
- 2010 Chevrolet Corvette
- 2011 Chevrolet Corvette
- 2012 Chevrolet Corvette
- 2013 Chevrolet Corvette
Cadillac CTS-V
- 2004 Cadillac CTS-V
- 2005 Cadillac CTS-V
- 2006 Cadillac CTS-V
- 2007 Cadillac CTS-V
- 2008 Cadillac CTS-V
- 2009 Cadillac CTS-V
- 2010 Cadillac CTS-V
- 2011 Cadillac CTS-V
- 2012 Cadillac CTS-V
- 2013 Cadillac CTS-V
- 2014 Cadillac CTS-V
- 2015 Cadillac CTS-V
Cadillac Escalade
- 2002 Cadillac Escalade
- 2003 Cadillac Escalade
- 2004 Cadillac Escalade
- 2005 Cadillac Escalade
- 2006 Cadillac Escalade
- 2008 Cadillac Escalade
- 2009 Cadillac Escalade
- 2010 Cadillac Escalade
- 2011 Cadillac Escalade
- 2012 Cadillac Escalade
- 2013 Cadillac Escalade
- 2014 Cadillac Escalade
Pontiac Firebird
- 1998 Pontiac Firebird
- 1999 Pontiac Firebird
- 2000 Pontiac Firebird
- 2001 Pontiac Firebird
- 2002 Pontiac Firebird
Pontiac G8
- 2008 Pontiac G8
- 2009 Pontiac G8
Pontiac GTO
- 2004 Pontiac GTO
- 2005 Pontiac GTO
- 2006 Pontiac GTO
GMC Sierra 1500
- 1999 GMC Sierra 1500
- 2000 GMC Sierra 1500
- 2001 GMC Sierra 1500
- 2002 GMC Sierra 1500
- 2003 GMC Sierra 1500
- 2004 GMC Sierra 1500
- 2005 GMC Sierra 1500
- 2006 GMC Sierra 1500
- 2007 GMC Sierra 1500
- 2008 GMC Sierra 1500
- 2009 GMC Sierra 1500
- 2010 GMC Sierra 1500
- 2011 GMC Sierra 1500
- 2012 GMC Sierra 1500
- 2013 GMC Sierra 1500
GMC Sierra 2500
- 2001 GMC Sierra 2500
- 2002 GMC Sierra 2500
- 2003 GMC Sierra 2500
- 2004 GMC Sierra 2500
- 2005 GMC Sierra 2500
- 2006 GMC Sierra 2500
- 2007 GMC Sierra 2500
- 2009 GMC Sierra 2500
- 2010 GMC Sierra 2500
- 2011 GMC Sierra 2500
- 2012 GMC Sierra 2500
- 2013 GMC Sierra 2500
- 2014 GMC Sierra 2500
GMC Sierra 3500
- 2001 GMC Sierra 3500
- 2002 GMC Sierra 3500
- 2003 GMC Sierra 3500
- 2004 GMC Sierra 3500
- 2005 GMC Sierra 3500
- 2006 GMC Sierra 3500
- 2009 GMC Sierra 3500
- 2010 GMC Sierra 3500
- 2011 GMC Sierra 3500
- 2012 GMC Sierra 3500
- 2013 GMC Sierra 3500
- 2014 GMC Sierra 3500
Chevrolet Silverado 1500
- 1999 Chevrolet Silverado 1500
- 2000 Chevrolet Silverado 1500
- 2001 Chevrolet Silverado 1500
- 2002 Chevrolet Silverado 1500
- 2003 Chevrolet Silverado 1500
- 2004 Chevrolet Silverado 1500
- 2005 Chevrolet Silverado 1500
- 2006 Chevrolet Silverado 1500
- 2007 Chevrolet Silverado 1500
- 2008 Chevrolet Silverado 1500
- 2009 Chevrolet Silverado 1500
- 2010 Chevrolet Silverado 1500
- 2011 Chevrolet Silverado 1500
- 2012 Chevrolet Silverado 1500
- 2013 Chevrolet Silverado 1500
Chevrolet Silverado 2500
- 1999 Chevrolet Silverado 2500
- 2000 Chevrolet Silverado 2500
- 2001 Chevrolet Silverado 2500
- 2002 Chevrolet Silverado 2500
- 2003 Chevrolet Silverado 2500
- 2004 Chevrolet Silverado 2500
- 2005 Chevrolet Silverado 2500
- 2006 Chevrolet Silverado 2500
- 2007 Chevrolet Silverado 2500
- 2008 Chevrolet Silverado 2500
- 2009 Chevrolet Silverado 2500
- 2010 Chevrolet Silverado 2500
- 2011 Chevrolet Silverado 2500
- 2012 Chevrolet Silverado 2500
- 2013 Chevrolet Silverado 2500
- 2014 Chevrolet Silverado 2500
Chevrolet Silverado 3500
- 2001 Chevrolet Silverado 3500
- 2002 Chevrolet Silverado 3500
- 2003 Chevrolet Silverado 3500
- 2004 Chevrolet Silverado 3500
- 2005 Chevrolet Silverado 3500
- 2006 Chevrolet Silverado 3500
- 2007 Chevrolet Silverado 3500
- 2008 Chevrolet Silverado 3500
- 2009 Chevrolet Silverado 3500
- 2010 Chevrolet Silverado 3500
- 2011 Chevrolet Silverado 3500
- 2012 Chevrolet Silverado 3500
- 2013 Chevrolet Silverado 3500
- 2014 Chevrolet Silverado 3500
Chevrolet SS
- 2014 Chevrolet SS
- 2015 Chevrolet SS
- 2016 Chevrolet SS
- 2017 Chevrolet SS
Chevrolet Suburban
- 2000 Chevrolet Suburban
- 2001 Chevrolet Suburban
- 2002 Chevrolet Suburban
- 2003 Chevrolet Suburban
- 2004 Chevrolet Suburban
- 2005 Chevrolet Suburban
- 2006 Chevrolet Suburban
- 2007 Chevrolet Suburban
- 2008 Chevrolet Suburban
- 2009 Chevrolet Suburban
- 2010 Chevrolet Suburban
- 2011 Chevrolet Suburban
- 2012 Chevrolet Suburban
- 2013 Chevrolet Suburban
- 2014 Chevrolet Suburban
Chevrolet Tahoe
- 2000 Chevrolet Tahoe
- 2001 Chevrolet Tahoe
- 2002 Chevrolet Tahoe
- 2003 Chevrolet Tahoe
- 2004 Chevrolet Tahoe
- 2005 Chevrolet Tahoe
- 2006 Chevrolet Tahoe
- 2007 Chevrolet Tahoe
- 2008 Chevrolet Tahoe
- 2009 Chevrolet Tahoe
- 2010 Chevrolet Tahoe
- 2011 Chevrolet Tahoe
- 2012 Chevrolet Tahoe
- 2013 Chevrolet Tahoe
- 2014 Chevrolet Tahoe
Chevrolet Trailblazer SS
- 2006 Chevrolet Trailblazer SS
- 2007 Chevrolet Trailblazer SS
- 2008 Chevrolet Trailblazer SS
- 2009 Chevrolet Trailblazer SS
Pontiac Trans Am
- 1998 Pontiac Trans Am
- 1999 Pontiac Trans Am
- 2000 Pontiac Trans Am
- 2001 Pontiac Trans Am
- 2002 Pontiac Trans Am
GMC Yukon
- 1999 GMC Yukon
- 2000 GMC Yukon
- 2001 GMC Yukon
- 2002 GMC Yukon
- 2003 GMC Yukon
- 2004 GMC Yukon
- 2005 GMC Yukon
- 2006 GMC Yukon
- 2007 GMC Yukon
- 2008 GMC Yukon
- 2009 GMC Yukon
- 2010 GMC Yukon
- 2011 GMC Yukon
- 2012 GMC Yukon
- 2013 GMC Yukon
- 2014 GMC Yukon
Vehicle applications reflect the fitment published by Texas Speed & Performance for this part number. Confirm your engine and cylinder head configuration before ordering.
FAQ
What comes in the Texas Speed 427ci Dart LS Next short block?
The short block includes the Dart LS Next iron 6-bolt block, a TSP 4.00" stroke 58x forged crankshaft, TSP 4340 6.125" I-beam rods, TSP/Wiseco 4.125" forged pistons in the dish you select, an ARP main stud kit and upgraded 1/2" head studs. This kit SKU also ships with break-in oil, an engine stand and a crate.
Should I pick the -4cc or -13cc pistons?
The -4cc piston gives a higher compression ratio for a naturally aspirated build, while the -13cc piston lowers compression for supercharged, turbocharged or pump-gas combinations. The final ratio depends on the cylinder heads and head gaskets you use.
How much horsepower can the 427ci Dart short block handle?
Texas Speed rates the 427ci Dart LS Next iron short block as capable of handling up to 1200 horsepower in street, drag racing or road course use.
Are head studs included with this short block?
Yes. Texas Speed includes upgraded 1/2" head studs with the 427ci Dart LS Next short block, in addition to the ARP main stud kit used on the bottom end.
Is this short block a complete engine?
No. It is a short block, so cylinder heads, camshaft, lifters, timing components, oil pump, oil pan, covers and accessories must be added to build a running engine.
