LS7 7.0L engine: specs, donor vehicles & swap notes

The LS7 is a 7.0 L aluminum-block Generation IV engine built 2006–2015, rated 503–536 hp. It came in 13 vehicle applications, including Chevrolet Corvette Z06, Spada Codatronca.

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Spec	Value
RPO	LS7
Family	Generation IV
Years	2006–2015
Displacement	7.0 L / 427 ci
Horsepower	503–536 hp
Torque	443–472 lb-ft
Bore × stroke	4.125 × 4.0 in
Compression	11.00:1
Block	aluminum
AFM/DOD	No
VIN 8th digit	E
Stock cam	Cam PN 12638426; duration 210°/230° @.050 in. int./exh.; valve lift 0.593"/0.589" int./exh.; 120° LSA, -3° advance; 3-bolt gear, 4x.
Firing order	1-8-7-2-6-5-4-3
Plug gap	0.040 in
Head casting	12578452

Known issues:

Valve guide wear from non-concentric machining. Fix: Install manganese-bronze valve guides and perform a valve job.
Dropped valves leading to catastrophic engine failure. Fix: Inspect guides early; bronze guides plus valve job before failure.

Aluminum, Ti connecting rods, dry sump

The LS7 specs above are not yet confirmed against GM documents; GM ratings varied by year and vehicle.

Swapping the LS7: what to plan for

Dry sump from the factory: plan room for the tank and lines, or a wet-sump conversion (pan, pickup and pump made for it). More: oil pans.
From a Corvette (Chevrolet Corvette Z06, Corvette 427 Convertible): Corvette spacing, the most compact accessory drive. More: accessory drive spacing.

Refresh parts for the LS7

From our Gen IV refresh list, the parts that are specific to the LS7. Seals, gaskets and the upgrades worth doing on any Gen IV with the engine out are in the full refresh list, next to every torque spec.

Part	GM part #	Why for this engine
Chevrolet Performance LS7 multilayer head gasket	12582179	Listed for the LS7; a new gasket goes on any time the heads come off.
LSXceleration Gen IV LS knock sensor 28-23730	28-23730	The LS7 has its knock sensors on the side of the block.

From real tunes: 7.0 L on a Gen IV computer

What these settings look like in the 107 naturally aspirated pump-gas tunes for 7.0 L engines on Gen IV computers (E38, E67 and the 24x E40) in our tune library (as of 2026-10-15). Every RPO of this size is pooled, not only the LS7, and so are all cams, heads and builds: that is why the ranges are wide. Use them to spot a value that is far outside what works, not as your numbers.

Setting	Range	Median	Tunes
Hot idle target	650 rpm to 925 rpm	850 rpm	107 (middle 80%)
Warm idle airflow, in gear	8.7 g/s to 15.0 g/s	10.2 g/s	106 (middle 80%)
Idle spark (around 800 rpm)	13° to 22°	16°	107 (middle 80%)
Power enrichment (PE) lambda	0.80 to 0.87	0.85	105 (middle 80%)
WOT spark at 5,000 rpm, about 0.9 g/cyl	16.0° to 25.0°	21.0°	107 (middle 80%)

For starting values matched to your LS7's cam, injectors and fuel, use the turn-on tune builder. Always finish on a dyno, and read our safe tuning limits before any wide-open pass.

Donor vehicles with the LS7

Where to find an LS7 at the junkyard: 13 vehicle applications below. Confirm it from the RPO sticker in the glovebox or the 8th VIN digit (for the LS7: E).

Vehicle	Years
Arash AF8	2014–present
Chevrolet Camaro Z/28	2014–2015
Chevrolet Corvette Z06	2006–2013
Corvette 427 Convertible	2013
Exotic Rides W70	2015
HSV W427	2008–2009
Hennessey Venom F5	2020–present
Mazzanti Evantra Millecavalli	2013
SIN R1 550	2015–present
Spada Codatronca	2008–present
Ultima Evolution	2015–present
Ultima GTR	2016
Zenvo ST1	2009–2016

Buying a used LS7

A used LS7 has no single part number, so this page does not link a search. Confirm the engine from the RPO sticker or the 8th VIN digit (for the LS7: E) before you buy.

Next steps

Questions about the LS7

What should I expect when upgrading to the GM 90mm (LS7) throttle body on a Silverado?

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