04.5-10 6.6L LLY, LBZ, & LMM Duramax P1P 66/68 Turbo | Buy P1LLYLMM66/68 Pure Diesel Power

Position 1 Performance 04.5-10 6.6L LLY, LBZ, & LMM Duramax P1P 66/68 Turbo

$2,152.30

Part Number: P1LLYLMM66/68
Est. Ship Time: Usually Ships in 1-2 Business Days

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California / Colorado Shipping Restriction
This turbo cannot be shipped to a California or Colorado delivery address. Buyers in CA or CO must provide an eligible out-of-state delivery address to complete the order.

The Position 1 Performance P1LLYLMM66/68 is a performance drop-in replacement turbocharger for 2004.5-2010 GM 6.6L LLY, LBZ, and LMM Duramax trucks. Built around a 66mm billet 6-blade compressor wheel and a 68mm 10-blade turbine, the 66/68 is rated at 700+ HP with adequate supporting modifications. It is 100% new, installs directly into the factory location with no modifications, carries no core charge, and includes a full gasket kit. Work stock legal. The 66/68 steps up from the 64/68 with a larger compressor wheel that moves more air at the top end while staying in the same 68mm turbine housing — the right choice for builds that have outgrown the 64/68 and want more headroom without jumping to the larger 72mm turbine.

Buy this if...

Your truck is a confirmed 2004.5-2010 GM 6.6L LLY, LBZ, or LMM Duramax
Your build is targeting up to 700+ HP with adequate supporting modifications
You want more top-end air flow than the 64/68 (650+ HP) while staying in the 68mm turbine housing
You want a direct drop-in turbo with no modification to factory mounting, exhaust, or intake — bolt-in and go
You compete or want to remain work stock legal

Do not choose this if...

Your build is at a lower power level where the 62/63 (550+ HP) or 64/68 (650+ HP) will spool faster and be a better match
Your build is pushing beyond 700+ HP — step up to the 68/68 (750+ HP), 68/72 (800+ HP), or 72/72 (850+ HP) to match your build
Your truck is not a 2004.5-2010 GM 6.6L LLY, LBZ, or LMM Duramax
Your ship-to address is in California or Colorado

Verify before ordering...

Confirm your truck is a 2004.5-2010 GM 6.6L LLY, LBZ, or LMM Duramax
Confirm your power target and supporting mods align with the 700+ HP rating
Confirm your ship-to address is eligible

The 66/68: More Compressor, Same Housing

The step from 64mm to 66mm on the compressor inducer is meaningful at the top end of the power range. The larger 66mm billet 6-blade wheel flows more air at higher boost levels where the 64mm wheel begins to work harder, giving the 66/68 an advantage on builds pushing into the 650-700 HP range with aggressive fueling. The 68mm turbine housing stays the same as the 64/68, which keeps installation identical — same drop-in fit, same downpipe, same charge pipes across LLY, LBZ, and LMM applications.

The 11.1mm high flow vanes improve exhaust gas flow through the turbine section. Updated HD journal bearings and HD 360 thrust bearing are built for sustained high-load, high-EGT operation. Work stock legal, 100% new, no core required.

HP Rating: 700+ HP with adequate supporting mods

Core Charge: None — no core return required

Condition: 100% new turbo

Warranty: 1 year unlimited mile — defects in parts and workmanship

Competition Legal: Work stock legal

Est. Ship Time: Usually ships in 1-2 business days

What Comes in the Box

Position 1 Performance P1LLYLMM66/68 66/68 turbo — 100% new
Full gasket kit

No core return required.

P1LLYLMM66/68 Specs at a Glance

Part Number	P1LLYLMM66/68
Fitment	2004.5-2010 GM 6.6L LLY, LBZ & LMM Duramax
HP Rating	700+ HP (with adequate supporting modifications)
Compressor Wheel	66mm billet 6-blade inducer
Turbine Wheel	68mm 10-blade exducer
Vane Size	11.1mm high flow
Bearings	Updated HD journal bearings, HD 360 thrust
Installation	100% drop-in — no modifications required
Competition	Work stock legal
Included	Gasket kit
Core Charge	None — no core return required
Condition	100% new
Warranty	1 year unlimited mile — defects in parts and workmanship
Shipping Restriction	Cannot ship to California or Colorado addresses

Full P1P LLY/LBZ/LMM Duramax Turbo Lineup — Choose Your Power Level

Turbo	Comp Wheel	Turbine	HP Rating	Part Number
62/63	62mm billet	63mm	550+ HP	P1LLYLMM62/63
64/68	64mm billet	68mm	650+ HP	P1LLYLMM64/68
66/68 (this page)	66mm billet	68mm	700+ HP	P1LLYLMM66/68
68/68	68mm billet	68mm	750+ HP	P1LLYLMM68/68
68/72	68mm billet	72mm	800+ HP	P1LLYLMM68/72
72/72	72mm billet	72mm	850+ HP	P1LLYLMM72/72

Fitment Coverage

2004.5-2005 Chevrolet Silverado 2500HD / 3500HD 6.6L LLY Duramax
2004.5-2005 GMC Sierra 2500HD / 3500HD 6.6L LLY Duramax
2006-2007 Chevrolet Silverado 2500HD / 3500HD 6.6L LBZ Duramax
2006-2007 GMC Sierra 2500HD / 3500HD 6.6L LBZ Duramax
2007.5-2010 Chevrolet Silverado 2500HD / 3500HD 6.6L LMM Duramax
2007.5-2010 GMC Sierra 2500HD / 3500HD 6.6L LMM Duramax

Before You Order — Final Check

Truck confirmed 2004.5-2010 GM 6.6L LLY, LBZ, or LMM Duramax
Power target and supporting mods align with 700+ HP rating
Drop-in installation confirmed — no modifications needed
Work stock legal status verified if competing
Eligible ship-to address confirmed
No core return required — confirmed

For a confirmed 2004.5-2010 GM 6.6L LLY, LBZ, or LMM Duramax build targeting up to 700+ HP with a direct bolt-in drop-in, the P1LLYLMM66/68 is the correct turbo to order.

Frequently Asked Questions

Click or tap any question below to open the answer.

What is the difference between the 66/68 and the 64/68?

The 66/68 uses a 66mm billet compressor inducer versus the 64mm on the 64/68. The larger compressor wheel moves more air at higher boost levels, giving the 66/68 an advantage on builds pushing into the 650-700 HP range where the 64mm begins to reach its limits. The turbine housing is the same 68mm on both turbos, so installation is identical — same drop-in fit, same downpipe, same charge pipes. If your build is solidly in the 650-700 HP range, the 66/68 is the correct choice.

Does this turbo fit LLY, LBZ, and LMM trucks?

Yes. The P1LLYLMM66/68 is a direct drop-in fit for all three engine families — LLY (2004.5-2005), LBZ (2006-2007), and LMM (2007.5-2010). All three use the same turbo mounting configuration and the same part number covers all of them.

Will this turbo fit without any modifications?

Yes. The P1LLYLMM66/68 is a 100% drop-in replacement. It mounts to the factory location, uses the factory charge pipes, and connects to the factory downpipe with no modifications required. The gasket kit is included.

What supporting mods do I need to reach 700+ HP?

The 700+ HP rating assumes adequate supporting modifications are in place. At minimum, a quality tune and upgraded injectors are required at this power level. Most builds here are also running a high-capacity fuel system, an upgraded intercooler, and supporting cooling and drivetrain components rated for the power. The turbo is capable — what you get out of it depends on what you have supporting it.

Is this turbo work stock legal?

Yes. The P1LLYLMM66/68 is work stock legal. Confirm the specific rules of your sanctioning body before competing, as class rules vary by organization and event.

Is there a core charge on this turbo?

No. The P1LLYLMM66/68 carries no core charge. You are not required to return your old turbo to complete the purchase.

My build is pushing more than 700 HP — which turbo do I need?

Step up to a larger option in the P1P LLY/LBZ/LMM lineup. The 68/68 is rated at 750+ HP, the 68/72 at 800+ HP, and the 72/72 at 850+ HP. All are direct bolt-in drop-ins for 2004.5-2010 LLY, LBZ, and LMM Duramax trucks.

What is the difference between LLY, LBZ, and LMM?

All three are GM 6.6L Duramax engines covering different model years. The LLY ran from 2004.5-2005, the LBZ from 2006-2007, and the LMM from 2007.5-2010. Despite differences in calibration and emissions equipment between them, all three share the same turbo mounting configuration — the P1LLYLMM66/68 is a confirmed drop-in fit for all three. If you are unsure which engine your truck has, the engine code is stamped on the block.

Can I order this turbo if I live in California or Colorado?

This turbo cannot be shipped to a California or Colorado delivery address. Buyers in CA or CO must provide an eligible out-of-state delivery address to complete the order.