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=====LS1=====
When introduced in the 1997 Corvette, the LS1 was rated at {{cvt|345|hp|0}} at 5,600 rpm and {{cvt|350|lbft|0}} at 4,400 rpm.<ref>{{Cite journal |last=Amann |first=Richard W. |last2=Damico |first2=Mark A. |last3=Green |first3=Brian |last4=Hahn |first4=Charles J. |last5=Haider |first5=Ameer |last6=Juriga |first6=John W. |last7=Mantey |first7=Creighton A. |date=1997-02-24 |title=1997 GM 5.7 Liter LS1 V8 Engine |url=https://www.sae.org/content/970915/ |journal=SAE Technical Paper |doi=10.4271/970915}}</ref> After improvements to the intake and exhaust manifolds in 2001, the rating improved to {{cvt|350|hp|0}} and {{cvt|365|lbft|0}} ({{cvt|375|lbft|0}} for manual-transmission Corvettes.<ref>{{cite web |url=https://www.caranddriver.com/reviews/a15132706/2005-chevrolet-corvette-z51-road-test/)|title=2005 Chevrolet Corvette Z51 |date=September 2004 }}</ref><ref>{{cite web |url=http://www.gmperformanceparts.com/Parts/showcase_detail.jsp?engine=2 |title=LS Engines - Small Block Engine - Crate Engine |publisher=GM Performance Parts |date=March 24, 2011 |access-date=January 25, 2012 |url-status=live |archive-url=https://web.archive.org/web/20111230121232/http://www.gmperformanceparts.com/Parts/showcase_detail.jsp?engine=2 |archive-date=December 30, 2011 |df=mdy-all }}</ref> The LS1 was used in the Corvette from 97 to 04. It was also used in 98-02 GM F-Body (Camaro & Firebird) cars with a rating of over {{cvt|305|–|345|hp|0}}, which was rumored to be conservative. The extra horsepower was claimed to come from the intake ram-air effect available in the SS and WS6 models. In Australia, continuous modifications were made to the LS1 engine throughout its lifetime, reaching 382 hp/376 ft-lb in the [[Holden Special Vehicles|HSV's]] VYII series, and a [[Callaway Cars Incorporated|Callaway]] modified version named "C4B" was fitted to HSV GTS models producing {{cvt|400|bhp|0}} and {{cvt|376|lbft|0}} of torque.<ref name="ls1">{{cite web|url=https://gmauthority.com/blog/gm/gm-engines/ls1/|publisher=GM Authority|access-date=October 22, 2021|title=GM 5.7 Liter V8 Small Block LS1 Engine|date=June 13, 2016|archive-date=September 24, 2024|archive-url=https://web.archive.org/web/20240924071139/https://gmauthority.com/blog/gm/gm-engines/ls1/|url-status=live}}</ref>
Applications:
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* 2007–2014 [[GMC Yukon XL]] 1500
*=====LH8=====*
The LH8 was introduced in 2008 as the V8 option for the Hummer H3. It was the simplest, most basic 5.3L V8 of its family, lacking any special technologies. Also known as the Vortec 5300, the LH8 was available in the H3 and GM mid-size pickups through 2009.
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=====LS427=====
The '''LS427''' is a {{cvt|7011|cc|L cuin|1}} engine based on the LS7
Unlike the LS7, the LS427 uses a conventional wet-sump oiling system with an F-body aluminum oil pan and wet-sump pump, eliminating the need for an external oil tank and plumbing required by the LS7's dry-sump system. This change makes the engine easier to install in a wider range of vehicles.
Peak output is {{cvt|570|bhp|PS kW|0}} and {{cvt|540|lbft|Nm|0}} of [[Torque#Machine torque|torque]] with a 7000 rpm redline.<ref>{{Cite web|url=https://www.chevrolet.com/performance-parts/crate-engines/ls/ls427-570|website=chevrolet.com|title=GM LS427/570|access-date=July 17, 2023}}</ref>▼
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Other changes include fifth-generation Camaro Z/28 exhaust manifolds and a 14 in manual transmission flywheel from the Z/28 platform, replacing the LS7’s stock components. It retains key LS7 features such as forged steel crankshaft, titanium connecting rods, CNC-ported aluminum cylinder heads with 70cc combustion chambers, and a 7000 rpm redline.
The engine is supplied fully assembled with intake manifold, fuel rails, injectors, throttle body, ignition coil packs, balancer, and water pump. It requires a specific LS427/570 engine controller (P/N 19420000) calibrated for this engine.
The LS427 was discontinued in January 2022 along with the LS7.
===4.06 in. bore blocks (2007–2017)===
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