L98 6.0L engine: specs, donor vehicles & swap notes
The L98 is a 6.0 L aluminum-block Generation IV engine built 2006–2010, rated 362 hp. It came in 6 vehicle applications, including Chevrolet Caprice, Holden VZ Ute.
We may earn a commission when you buy through links on this page.
| Spec | Value |
|---|---|
| RPO | L98 |
| Family | Generation IV |
| Years | 2006–2010 |
| Displacement | 6.0 L / 364 ci |
| Horsepower | 362 hp |
| Torque | 391 lb-ft |
| Bore × stroke | 4.0 × 3.622 in |
| Compression | 10.40:1 |
| Block | aluminum |
| AFM/DOD | No |
| Reluctor | 58x |
| Stock cam | Cam PN 12625439; duration 196°/208° @.050 in. int./exh.; valve lift 0.478"/0.466" int./exh.; 116° LSA; 1-bolt gear, 4x; AFM No, VVT No. |
| Firing order | 1-8-7-2-6-5-4-3 |
| Oil capacity | 6.0 qt |
| Oil filter | 89017524 / PF48 |
| Spark plug | 12571164 / 41-985 |
| Plug gap | 0.040 in |
Aluminum, L76 with AFM hardware removed
The L98 specs above are not yet confirmed against GM documents; GM ratings varied by year and vehicle.
How the L98 differs from the other 6.0 L Gen IV engines
The L98 is one of the nine 6.0 L Gen IV engines we list: L76, L77, L96, L98, LC8, LFA, LS2, LY6, LZ1. From our engine table:
- Aluminum block. Among the 6.0 L Gen IV engines, the L98 shares it with the L76, L77, LFA, LS2, LZ1; the L96, LC8, LY6 are iron.
- No AFM. The L76, L77, LFA, LZ1 have it, so the L98 is the easier cam-swap candidate of the group.
- Compression 10.40:1, within the group's 9.6–10.9:1 spread.
- Up to 362 hp from the factory (3rd of the nine 6.0 L Gen IV engines we list; the group tops out at 400 hp).
- No VVT (the L96, LC8, LY6, LZ1 have it; the L76 has it (truck applications only)).
- Built 2006–2010.
Swapping the L98: what to plan for
- Computer: the L98 has a 58x crank. An E38 or E67 matches it; a 0411/P59 also needs a 58x-to-24x converter box and its own sensor and knock-sensor wiring. Throttle and wiring have to suit the computer too. More: how to wire your LS (the full checklist for your engine and computer).
Refresh parts for the L98
From our Gen IV refresh list, the parts that are specific to the L98. 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 |
|---|---|---|
| LSXceleration Gen IV LS knock sensor 28-23730 | 28-23730 | The L98 has its knock sensors on the side of the block. |
| GM Gen IV camshaft position sensor 12591720 (58x engines) | 12591720 | 58x L98: the cam sensor lives in the front cover. |
| Chevrolet Performance 58x crankshaft position sensor 12703627 | 12703627 | 58x L98: the crank sensor is behind the starter. |
From real tunes: 6.0 L on a Gen IV computer
What these settings look like in the 329 naturally aspirated pump-gas tunes for 6.0 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 L98, 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 | 550 rpm to 850 rpm | 700 rpm | 327 (middle 80%) |
| Warm idle airflow, in gear | 6.0 g/s to 12.3 g/s | 8.0 g/s | 326 (middle 80%) |
| Idle spark (around 800 rpm) | 13° to 20° | 15° | 329 (middle 80%) |
| Power enrichment (PE) lambda | 0.78 to 0.87 | 0.83 | 322 (middle 80%) |
| WOT spark at 5,000 rpm, about 0.9 g/cyl | 12.0° to 25.0° | 19.0° | 329 (middle 80%) |
For starting values matched to your L98'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 L98
Where to find an L98 at the junkyard: 6 vehicle applications below. Confirm it from the RPO sticker in the glovebox or the 8th VIN digit.
| Vehicle | Years |
|---|---|
| Chevrolet Caprice | 2006–2013 |
| Holden VE Calais | 2006–2009 |
| Holden VE Commodore (manual only from 2008 to 2010) | 2006–2010 |
| Holden VE Ute (manual only from 2008 to 2010) | 2006–2010 |
| Holden VZ Ute | 2006–2007 |
| Holden WM Statesman/Caprice | 2006–2008 |
Buying a used L98
A used L98 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 before you buy.