BNR S4 Version 5 Turbo Kit Mazdaspeed 3 2007-2013 | Mazdaspeed 6 2006-2007

The BNR S4 is the most popular turbocharger in the MZR market!  The S4 will max out the original engine and has enough on the table to make mid 500  WHP with Auxiliary fueling in internal wastegated orientation.   Great response and amazing sounds come from this unit!  Makes a great entry level turbocharger for built engines.

BNR G30-770 CHRA Rated at 66 lb/min
VSR Balanced
BNR Upgraded compressor housing with Antisurge port
Heavy Duty 15 psi wastegate actuator
Heavy Duty wastegate swing valve construction
30 mm wastegate port
.72 a/r turbine housing
Install kit includes:

9 M10 1.5 staintless studs
9 M10 1.5 stainless nuts
9 M10 stainless washers
2 M12 copper sealing washers
4 M14 copper sealing washers
2 Oil outlet gaskets
Stainless MLS turbine inlet gasket
Stainless MLS turbine outlet gasket
Firewall side extended stainless water line
*Divorced down pipes sometimes do not work with our turbocharger upgrades!  If they are used, the wastegate valves sometimes don't function  properly causing extreme high boost conditions!*