SDP S475 Twin Turbo Kit

This twin turbo kit for the Duramax LB7, LLY, LBZ, and LMM is engineered for maximum performance by skilled craftsmen that love creating durable, high performance diesel truck parts.

SDP Screamin Diesel Performance

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We completely get rid of the EGR system in our kits, which cleans up the under the hood look and includes a higher flowing EGR delete pipe.

The new intercooler tube has a very solid 1/4" thick brace welded on to keep the intake horn inside the cross bridge as it was intended to from the factory.

Completely TIG welded, makes for very smooth joints and the insides of the tubing are flush.

Custom higher flowing mouthpiece that is also o-ringed to ensure there are no boost leaks where the mouthpiece mates with the factory turbo.

It’s the ultimate for a truck that tows often with an occasional trip to the track. This kit is rated to 670rwhp with the stock fuel system, up to 750rwhp can be achieved efficiently. EGT's are guaranteed to drop anywhere from 200-400+* hot tune or towing.

The kit uses a BullsEye Power S475 T-6 turbo with the 1.32 A/R larger exhaust housing so it’s unnecessary to waste gate the setup, the spool up is very quick with this turbo in the kit.

We use the correct designed flange off of the back side of the factory exhaust housing, they are CNC machined and are designed to tightly slip inside the outlet of the exhaust housing and seal exhaust flow at the v-band connection.

High quality stainless steel v-band clamps and t-bolt clamps are used at each connection.

The hot side piping and exhaust housing are ceramic coated and heat wrapped.

The cold side piping and compressor housing are powder coated color of choice.

You will need to modify your existing passenger side up-pipe. A good choice for up-pipes if looking to change them are the ProFab Tow Flow Performance Up-Pipes $575.00

Shipping is for continental US only

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