The SPOOLOGIC Turbo Install Kit SL-300-023 is the complete turbo R&R kit for 2007.5-2010 6.6L Duramax LMM trucks — all four up-pipe gaskets and bolts, the EGR cooler to up-pipe gasket, the turbo oil feed line, the turbo oil drain line with gaskets and hardware, the turbo inlet clamp, and the turbo downpipe clamp in one box. Backed by a 1-Year Limited Warranty.

Every part in this kit is single-use by design. MLS gaskets crush down to the exact roughness of the flange on first torque, oil feed and drain gaskets take a permanent compression set the moment you install them, and V-band clamps stretch after the first heat cycle. Reusing any of them is the #1 cause of post-turbo-job leaks — that’s why we built the whole kit around one-and-done, install-it-right hardware.

Common Turbo R&R Failure Symptoms

• Exhaust leak or tick after turbo swap — reused MLS gasket at the up-pipe or turbo mounting joint that already crushed on the previous install.
• Oil weeping onto the turbo — oil feed or oil drain gaskets that took a compression set and can’t seal engine oil at temperature.
• Boost leak or slow spool — a leaking turbo-mount or manifold gasket, or a stretched V-band on the downpipe.
• Bolt backed out or snapped at torque — reused turbo mounting or up-pipe hardware with stretched threads or a deformed underhead.

Why You Replace All of This — Not Just the One That’s Leaking

Turbo R&R hardware and seals are not designed to be reused. Here’s what’s actually happening to the parts you’re tempted to put back:

• Multi-layer steel (MLS) gaskets — stacked thin steel sheets bonded with an elastomer coating. On first torque-up the layers crush down to mate the exact surface roughness of the flange. Once crushed they cannot crush again to a new surface. Reused MLS gaskets are the #1 cause of post-turbo-job exhaust leaks at the flange.
• Crush washers — work by plastically deforming on first torque. A used crush washer is a flat washer. It cannot seal high-pressure oil at the turbo feed banjo.
• V-band clamps — once heat-cycled and torqued to spec, the band stretches and the T-bolt threads gall. Reusing a stretched V-band means you can’t get even clamp load — that’s an exhaust or boost leak waiting to happen.
• Bolts and studs — the hardware that holds the turbo, up-pipes, and drain line lives in the hottest part of the engine. Threads stretch, heads warp, and the underhead bearing surface deforms. New hardware is cheap insurance.

Component Breakdown — What Each Piece Seals

• 4 up-pipe gaskets — MLS gaskets that seal the left and right up-pipes at both the manifold and turbo ends.
• 12 up-pipe bolts — hold the up-pipes to the manifolds and the turbo.
• 1 EGR cooler to up-pipe gasket — seals the EGR cooler joint at the up-pipe.
• 1 turbo oil feed line — new feed line, not just a reseal of the OE.
• 2 turbo oil feed line banjo bolts — banjo bolts at the turbo and block ends of the feed line.
• 2 turbo oil feed line double-washers — copper sealing washers for the banjo bolts at the feed line.
• 1 turbo oil drain line — new drain line, not just gaskets.
• 2 turbo oil drain line gaskets — seal the drain line at the turbo and block ends.
• 2 turbo oil drain line studs with nuts — hold the drain line flange.
• 2 turbo oil drain line bolts — remaining drain-line fasteners.
• 1 turbo downpipe clamp — V-band clamp at the turbine outlet to downpipe joint.
• 1 turbo inlet clamp — V-band clamp at the turbo inlet.

Material Technology — Why Each Material Was Chosen

• Multi-layer steel (MLS) construction — the up-pipe, turbo flange, and pedestal gaskets are MLS, not composite. MLS uses three or more thin steel layers with an elastomer coating, each layer free to flex independently as the joint grows and shrinks with heat. This is the construction that survives thermal cycling on the hot side of the turbo.
• Copper crush washers — soft copper plastically deforms on first torque to fill the irregular surface between banjo bolt, banjo, and turbo housing. Copper plastically deforms predictably without work-hardening and tolerates the heat.
• Stainless V-band clamps — stainless steel band and T-bolt construction so the clamp can take repeated heat cycles without losing tension or galling at the fastener.
• Heat-treated hardware — the turbo, up-pipe, downpipe, and drain-line bolts and studs are heat-treated to the OE grade specification so they handle the clamp load without stretching or backing out.

Install Notes

• Do not reuse any gasket, O-ring, clamp, washer, bolt, or stud in this kit — every piece is single-use by design.
• Clean every mating surface before installing the new gasket. MLS gaskets cannot bridge over carbon deposits, machining burrs, or old gasket material. A razor scraper and brake clean is the minimum.
• Follow the OE service manual torque specs and sequence — turbo, pedestal, and flange bolts have specific torque values and tightening sequences. Don’t guess.
• Inspect the sealing surfaces on the turbo, manifold, and up-pipe flanges for cracks or warpage before reinstalling.

Features

• Complete turbo install kit for 2007.5-2010 LMM Duramax
• New stainless turbo oil feed line and oil drain line
• Multi-layer steel up-pipe and EGR cooler gaskets
• Copper double-washers on the high-pressure oil feed banjo bolts
• Two stainless V-band clamps — turbo inlet and downpipe
• Heat-treated up-pipe and drain-line hardware
• Backed by a 1-Year Limited Warranty

What’s Included

• 4 up-pipe gaskets
• 12 up-pipe bolts
• 1 EGR cooler to up-pipe gasket
• 1 turbo oil feed line
• 2 turbo oil feed line banjo bolts
• 2 turbo oil feed line double-washers
• 1 turbo oil drain line
• 2 turbo oil drain line gaskets
• 2 turbo oil drain line studs with nuts
• 2 turbo oil drain line bolts
• 1 turbo downpipe clamp
• 1 turbo inlet clamp

Fits 2007.5-2010 6.6L Duramax LMM

• 2007.5 – 2010 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LMM
• 2007.5 – 2010 Chevrolet Express GMC Savana 2500 3500 4500 6.6L Duramax LMM

Turbo Applications

This install kit fits the following factory turbocharger:

• Garrett GT3788VA (2007.5-2010 6.6L Duramax LMM)

1-Year Limited Warranty

Every SPOOLOGIC Turbo Install Kit is covered by a 1-Year Limited Warranty against defects in materials and workmanship for the original purchaser. To initiate a warranty claim, the kit must first be shipped back to SPOOLOGIC at the customer’s expense for inspection. If SPOOLOGIC determines the kit is defective in materials or workmanship, a replacement will be shipped at SPOOLOGIC’s cost. Warranty does not cover labor, downtime, towing, consequential damages, failures caused by improper installation, failures caused by dirty or damaged mating surfaces, reuse of any kit component, or use outside the listed fitment.