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Texas Speed & Performance Cleetus McFarland "Leroy 1.0" Resleeved 427 CID Long-Block Cadillac | Chevrolet | GMC 1997-2016 - TSP-427RESL-CLEETUS-LB
Run the same 427 CID re-sleeved Gen 4 long-block as Cleetus McFarland's savage "Leroy" C5 Corvette that was the FIRST GM six-speed manual vehicle in the 7's! This long-block is built for boost and ready for some serious power and made all of the bald eagles for Cleetus' epic 7.82 @ 176 MPH pass! We have dubbed this engine "Leroy 1.0" since "Leroy 2.0" was upgraded to a GMPP LSx 6-bolt iron block.

This engine combinaton was built for Leroy's twin turbo setup with a goal of supporting up to 1,000 RWHP with ease. Complete with bald eagles and a healthy dose of 'murica, this long-block is ready to do it for Dale! Cleetus definitely pushed this engine to the limits making well past the 1,000 RWHP mark, so if you plan to do the same we do recommend upgrading to 1/2" head studs. We also stock all of the GM and aftermarket bolts and gaskets to complete your engine build!

The optional LS2 conversion package will be required if you are installing this engine into a vehicle that was originally equipped with a Gen 3 engine. The LS2 conversion package will include the following items: LS2 valley cover, set of 4 LS2 lifter trays, cam sensor extension harness, knock sensor extension harness, LS2 timing cover set, and Rollmaster LS2 single-roller timing set.



Specifications:
  • New TSP Re-sleeved Gen 4 Aluminum Engine Block with Darton Stepped Sleeves
  • TSP Forged 4.00" Stroke Wet Sump Crankshaft with Your Choice of 24x or 58x Reluctor Wheel
  • TSP 6.125" Super I-Beam Connecting Rods with ARP L19 Rod Bolts
  • Wiseco 4.125" Forged Piston Set with -20cc Dish
  • Wiseco Upgraded HD Piston Wrist Pins
  • Wiseco Steel Top/Napier 2nd Ring Set
  • ARP Main Stud Kit
  • Precision Race Components 237cc Aftermarket Cathedral Port Cylinder Heads
  • TSP/PAC .700" Dual Spring Kit w/ Titanium Retainers
  • TSP "Bald Eagle" Turbo Camshaft for Stroker Engines
  • Athena HD Head Gaskets w/ Stainless Steel Fire Rings
  • ARP 12-Pt. Head Stud Kit
  • GM Rocker Arms w/ TSP Trunnion Upgrade Kit
  • TSP Hardened Pushrods
  • Johnson 2110R Lifters
  • 12 Quarts of Break-In Oil
  • Complete Set of TSP Windage Tray Spacers


Fitment:
  • Cadillac CTS-V 2004-2015
  • 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
Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Texas Speed & Performance Banner

ABOUT TEXAS SPEED AND PERFORMANCE

Texas Speed and Performance began as a small business in 2003. Texas Speed and Performance is situated in Georgetown, Texas, and is a leader in the LSx sector. Texas Speed & Performance has quickly established itself as one of the largest performance makers and retailers of premium LSX and LT1 packages in the United States. Texas Speed and Performance founders, Trevor Doelling and Jason Magnum, have a combined 30+ years of experience in the high-efficiency sector and are constantly striving to research and manufacture the highest quality performance goods for your car. This is accomplished by putting their products through their paces on their in-house futuristic super flow engine dyno. Texas Speed and Performance components can be found in some of the fastest street and competition automobiles in the country.

WHY CHOOSE TEXAS SPEED AND PERFORMANCE?

Texas Speed and Performance provides all levels of aftermarket performance products from LSx and 2014+ 6.2L LT1/LT4 performance parts, aftermarket cast cylinder heads, basic air induction exhaust, camshafts, stroker engines and in-house machining of all their engines. They are one of the largest LSx and 2014+ 6.2L LT1/LT4 specific shops in the country. Owing to their in-house cylinder head manufacturing, engine assembly, and camshaft grinding facility, they assist customers with all of their high-performance LSx and 2014+ 6.2L LT1/LT4 needs and requirements.

TEXAS SPEED AND PERFORMANCE PRODUCT LINE

Texas Speed and Performance Exhaust offers camshafts, short and long blocks, turn-key engines, valvetrain, crankshafts, rods, and aftermarket cylinder heads.

VIVID RACING-TEXAS SPEED AND PERFORMANCE

The Texas Speed and Performance products at Vivid Racing include the Texas Speed and Performance Stage 4.2 LS7 Camshaft Chevrolet Camaro, Corvette 2006-2015, which has fitment for the Chevrolet Camaro 2012-2015 and Chevrolet Corvette 2006-2013 models.

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Sale price None
Wholesale price $19,538.32
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Product Added At Tuesday 21 January, 2025
Product Modified At Tuesday 27 May, 2025
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Last Edited By kathi@vividracing.com
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Emissions Info
Carb Approved No
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Epa Status -
Prop65 -
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Texas Speed & Performance $16,557.90 $17,004.99 ? ? ? 2025-05-27 16:34:43


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