Big Boss Exhaust Manifold for Cummins ISX Models with PDI Turbo.

Features
- Cast HSM Material
- Performance Replacement
- No-Leak Design
- Stud-Turbo Mount
- High-Strength, Quality A280 Inconel Studs

Benefits
- 20% Flow Increase
- Increased Exhaust Flow
- Lower EGTs
- Quicker Spool Up in Turbo
- Eliminate Warping & Cracking

Upgrades
- Big Boss Turbo
- Big Boss ECM

Forged from HSM material, PDI’s manifolds eliminate the warping and cracking problems of an OEM manifold. With a high moly content, the worry of center-divider failure and metal dissipation is eliminated. Each manifold is designed with a full-contact joint, which allows for heat and expansion, while holding a tight, efficient seal. Each PDI manifold includes high strength, quality studs for added strength and durability. Improved air flow helps to lower exhaust temperatures, reduce turbo lag, and increase horsepower and torque.

*** Cannot be Used with Factory VGT Factory Turbo

*** Picture is Representative Not Actual.