Wehrli replaces the 2.5 in. factory driver (hot) side pipe with a one-piece 3 in. pipe in 14 ga mandrel-bent aluminum.
The factory pipe uses a reverse bead roll at the turbo that tends to blow off once boost climbs past stock. Wehrli's pipe uses straight, high-pressure silicone boots instead of angled ones, with T-bolt clamps.
LLY, LBZ and LMM owners who have blown the hot side pipe off, or want to prevent it.
| Engines / years | 6.6L LLY / LBZ / LMM Duramax, 2004.5-2010 |
|---|---|
| Pipe | 3 in., one-piece, 14 ga mandrel-bent aluminum |
| Boots | Straight silicone, no angled boots |
| Tuning | Not required |
| Shipping weight / box | 10 lb · 12 × 12 × 36 in |
Professional install available at Powertech Diesel, Idaho Falls — call 208-542-7793.
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