BPS Wastegated 1.15 A/R Exhaust Housing S400 / S475 / S478 / S410SX

Gate the 1.15 T6 volute with the BPS billet wastegate pod with the BPS Wastegated 1.15 A/R Exhaust Housing; you get cast 1669, a T6 divided inlet, A/R 1.15, and the BPS exclusive billet gate pod on the housing.

Same wastegated S400 family as the BPS 1.32 housing, cut to the tighter 1.15 A/R.

BPS Diesel exclusive. Cast turbine housing, stamp 1669, T6 divided flange, A/R 1.15, BPS billet aluminum wastegate pod installed. Built for BorgWarner-style S400, S475, S478, and S410SX turbos on the 88/96 turbine wheel.

Gate starts to open at 34 PSI and is full open at 38 PSI. A 24–28 spring is available for lower-horsepower setups (BPS28SPRING). The 1.15 A/R is the tighter volute in this housing family, so it spools sooner than the 1.32 on the same wheel.

Confirm the A/R and the number stamped on the old housing before ordering.

What’s Included

• (1) Wastegated 1.15 A/R T6 exhaust housing — cast 1669, BPS billet gate pod installed
• (1) Blue gate line
• (1) Wastegate spring
• (2) Hose clamps
• (1) Brass 90° fitting

Key Features

• Interchangeable wastegate control. Gate actuation starts at 34 PSI for gradual boost management and is fully open at 38 PSI, so boost stays consistent across load and elevation. A 24–28 spring is available for lower-horsepower setups (BPS28SPRING).
• Full billet wastegate pod. Machined from billet aluminum so the pod holds up under heat, pressure, and road vibration.
• T6 divided inlet, A/R 1.15, cast 1669. Ready to install in place of a standard 1.15, 1.32, or 1.45 housing on the same S400 frame.
• S400, S475, S478, and S410SX on the 88/96 turbine wheel. Built for CAT C15, Cummins ISX, and Detroit Series 60 trucks already running a BorgWarner-style housing on that frame.
• Tighter 1.15 A/R for earlier spool on heavy hauls, with the gate managing boost so EGTs stay in check under load.
• Gate line, spring, clamps, and brass 90 in the box. No core.
  

OEM Cross References 1669, 171701, 171702, 14969880000, 14969880001, 14969880002, 14969880003, 14969880004, 14969880005, 14007100002, 14007100003, 14007100004, 14007100005, 14007100006, 14009097013

Applications BorgWarner-style S400, S475, S478, and S410SX turbos on an 88/96 turbine wheel with a T6 divided inlet, where the old housing is a 1.15 / 1.32 / 1.45 on that frame.