ISX15 / X15 T6 Performance Manifold Hardware & Gasket Kit | Bolt & Spacer (OEM-Style)
The Diesel Power Source® ISX15 / X15 T6 Performance Manifold Hardware & Gasket Kit (Bolt & Spacer) is a complete install package for the DPS T6 ISX Performance Exhaust Manifold, the manifold built for ISX15 and X15 builds running aftermarket S400 frame turbochargers with a T6 inlet flange. The kit covers everything from the manifold-to-head install to the T6 turbo mounting — the divided turbo gasket, the multi-section manifold gaskets, and the T6 4-bolt flange hardware.
This is the OEM-equivalent install configuration, using long flange bolts and spacers in the manifold-to-head positions. It's a performance manifold but a familiar mounting method — the right pairing if your shop is comfortable with stock-style fastener workflow on a high-horsepower build, or if the truck won't see the kind of teardown frequency that justifies studs. For builders running big boost or repeated R&R cycles, the Stud & Nut version is engineered around that load case.
Pairs with the DPS T6 ISX Performance Exhaust Manifold (MAN1006 / MAN1010). Includes manifold-to-head bolts and spacers, the multi-section gasket set, the T6 divided turbo flange gasket, and the T6 turbo flange hardware (2 studs, 2 bolts, 4 DIN6923 serrated nuts).
A Performance Manifold With Familiar Mounting
The T6 manifold is the upgrade path for ISX15 and X15 builds chasing horsepower with an aftermarket S400 frame turbo. The T6 flange is significantly larger than the factory ISX flange, with four large fasteners arranged for a divided pulse design that keeps front-bank and rear-bank exhaust pulses separated until they reach the turbine — measurably better spool on big-frame turbos. None of that complicates the manifold-to-head install. The manifold mounts to the head the same way the stock-replacement manifolds do.
OEM-Spec Manifold-to-Head Mounting
Twelve M10 long flange bolts pass through the manifold flange, through 60mm spacers, and into threaded bores in the cylinder head. Two shorter flange bolts handle the end positions. This is the same mounting configuration the stock-replacement Bolt & Spacer kits use — familiar workflow for any shop that has installed an ISX15 manifold before.
T6 Divided Flange Gasket and Hardware
Where the install diverges from a stock-flange job is at the turbo. The T6 4-bolt mounting pattern is significantly larger than the stock turbo flange, and the divided gasket is shaped to match the pulse-divided turbine inlet. The kit includes 2 studs, 2 flange bolts, and 4 DIN6923 serrated flange nuts for the T6 mounting — the standard T6 fastener arrangement.
Multi-Section Gasket Set
Same multi-section gasket scope as the stock-replacement kits — center gasket plus four end gaskets to seal each segment of the multi-piece manifold to the cylinder head. The DPS expansion-joint design only protects the head if every section seals individually, and that's what these gaskets are for.
Who This Kit Is For
- Owner-operators and performance shops installing the DPS T6 ISX Performance Manifold
- Class 8 trucks upgrading from a factory ISX turbo to an aftermarket S400 frame turbocharger
- High-horsepower ISX15 / X15 builds — fleet performance, hot-shot, race, and pull truck applications
- Fleets that prefer the factory bolt-and-spacer manifold-to-head mounting method
- Builders who want all install hardware and gaskets in a single SKU
What's Included
| Qty | Component | Purpose |
|---|---|---|
| 1 | T6 Divided Turbo Flange Gasket | Seals turbo to T6 manifold flange |
| 1 | Turbo Oil Drain Gasket | Seals oil drain line to turbo |
| 1 | ISX Manifold Center Gasket | Seals center manifold section to head |
| 4 | ISX Manifold End Gaskets | Seals end manifold sections to head |
| 2 | M10-1.5 × 20-12-16 T6 Turbo Studs | Mounts T6 turbo to manifold flange |
| 2 | M10-1.5 × 55mm T6 Turbo Flange Bolts | Mounts T6 turbo to manifold flange |
| 4 | M10-1.5 DIN6923 Serrated Flange Nuts | Pairs with T6 turbo studs and bolts |
| 12 | M10-1.5 × 100mm Manifold Flange Bolts | Manifold-to-head mounting |
| 2 | M10-1.5 × 40mm Flange Bolts | End-position manifold mounting |
| 12 | M10-1.5 × 60mm Spacers | Pairs with 100mm flange bolts |
Key Features
- Complete T6 manifold install package — every gasket and fastener needed for the manifold and T6 turbo install
- OEM-style bolt-and-spacer manifold-to-head mounting
- T6 divided turbo flange gasket included — matches the DPS T6 manifold's divided pulse design
- T6 turbo flange hardware included — 2 studs, 2 bolts, 4 serrated nuts for the 4-bolt T6 pattern
- DIN6923 serrated flange nuts — resist vibration loosening on T6 turbo flange
- Direct fit for the DPS T6 ISX15 / X15 Performance Manifold
Benefits
- Eliminates the need to source manifold gaskets, T6 turbo gaskets, T6 turbo hardware, and mounting bolts separately
- Reduces shop time per manifold install — every part needed is in one box
- Improves long-term sealing across all manifold-to-head sections and the T6 turbo flange
- Built for high-horsepower S400 frame turbo applications
Fitment
- Cummins ISX15 and X15 engines
- Pairs with the Diesel Power Source® T6 ISX Performance Exhaust Manifold (MAN1006 / MAN1010)
- Compatible with T6-flange turbochargers — S400 frame turbos and similar large-frame T6 applications
- Class 8 high-horsepower performance, hot-shot, race, and pull truck builds
Note: This kit is for the DPS T6 ISX Performance Manifold (MAN1006 / MAN1010), which is a performance manifold for aftermarket S400 frame T6-flange turbochargers. It will not fit factory ISX turbochargers, which use a different flange. If you're keeping the factory turbo, see the ISX15 / X15 EGR or Non-EGR Manifold Hardware Kits instead.
