SKU: 29512479966

BNR Mazdaspeed3/6 S5 Turbocharger

Sale price$618.75 Regular price$687.50
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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

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Description

BNR Mazdaspeed3/6 S5 TurbochargerBNR S5 Turbocharger Upgrade The S5 has a 3. 5 compressor inlet and works with a 3. 5 or larger intake pipe (same casting as S4). All the tuners like using an aftermarket boost control going to your 44 46mm v band style wastegate! The S5s point milled, billet compressor wheel is rated for 62 lb min air flow and is the larger of the 76mm Garrett compressor wheels with a 58mm inducer and 76mm exducer with 3mm compressor tip height extension. Our S5 is

BNR S5 Turbocharger Upgrade

The S5 has a 3.5” compressor inlet and works with a 3.5” or larger intake pipe (same casting as S4).   All the tuners like using an aftermarket boost control going to your 44-46mm v band style wastegate!  The S5’s point milled, billet compressor wheel is rated for 62 lb/min air flow and is the larger of the 76mm Garrett compressor wheels with a 58mm inducer and 76mm exducer with 3mm compressor tip height extension.  Our S5 is comparable to the competition’s GTX 3076, but what separates BNR from the others is our own custom, 44-46mm external wastegate, .82 a/r turbine housing!  This turbocharger on a forged engine with ported stock intake gets 20 psi by 3400-3600 RPM.  The first test car maxed out the intake and the 6 port injection at 515 RWHP at 32 psi!   Axillary port injection is needed to go higher than stock fuel limitation  (370 WHP).  The S5 has the capabilities for 550 WHP without sacrificing response.  The S5 spools better than the competition’s 3076 by approximately 300 RPM even with the big turbine housing!    We lowered the price recently because we stopped making the oil return lines!  OIL LINE DETAILS HERE!

Here is what you get with the S5 turbocharger upgrade!

  • GT30 Turbine wheel
  • 58mm/76mm point milled billet compressor wheel (62 lbs/min flow rate)
  • High Performance 360 thrust assembly
  • Wide journal bearings
  • Rear journal bearing oil deflector (Diverts oil away from the turbine seal)
  • High Performance turbine seal
  • Balanced and blue printed to .5 gram/in2
  • BNR’s custom T2 bearing housing (uses all OE oil and water fittings)
  • BNR compressor housing (3.5” inlet, 2.25” outlet)
  • BNR .82 a/r turbine housing with 44 mm wastegate v-band
  • All stainless hardware
  • 5 Layer stainless MLS turbine inlet/outlet gaskets
  • (9) M10 1.5 exhaust studs
  • Extended stainless water line (firewall side)
  • (4) 14mm copper sealing rings
  • year warranty!

 

BNR Supercars specializes in the Mazdaspeed3 and Mazdaspeed6 turbochargers. 

Peak numbers are not what we are into.  We like designing turbocharger upgrades that produce maximum under the curve power and torque.  It makes these cars much more responsive and fun to drive on the street.  When you get greedy and go for that peak number, it kills the bottom and mid-range torque.   No bottom end torque makes the engine not as responsive for autocross/road racing and in BNR's opinion not as fun to drive!

These engines are doing very well handling 400-450 WHP with the stock bottom end.  Most people looking for a reliable replacement over the stock smoking KO4 usually go for the S1 or S2 turbocharger models since a tune isn’t required.  If your car is fully bolted with high performance fuel pump internals we suggest an S3 with a tune.  Fully bolted with added methanol injection go with the S4 and a tune.   Stock engine internals, don’t even think about doing an S5 or S6!

*Divorced down pipes do not work with BNR turbocharger upgrades!  If they are used, the wastegate valves will not open properly causing extreme high boost problems!*

*Built engines need a custom oil supply line for turbocharger protection!  Click link for details!*

Mazdaspeed 3/6 Custom Oil supply line “Built engines only”

*S5 and S6 model turbochargers to cover the cost of the custom oil drain line! 

*Please note, turbos may ship directly from BNR, so please allow extra time for the turbo to be built and delivered.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 29512479966

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Amazon Customer
New York, US
★★★★★ 5
Love these and will be getting more. Very pretty.
Color: Oak, Size: 39.4"L x 8"D, Set of 2, Color: Oak, Size: 39.4"L x 8"D, Set of 2
Very nice shelves they look great up and were easy to install. Same color shown in picture. They seem very sturdy on the wall and I love the look of them. They are light weight and a good size just a little plunder 40 inches. Good quality for the price. I'll be buying again.
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Reviewed in the United States on March 25, 2026
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Myers3
Chelsea, US
★★★★★ 5
PERFECT!
Color: Walnut, Size: 23.6"L x 8"D, Set of 2, Color: Walnut, Size: 23.6"L x 8"D, Set of 2
Just as good as expected! Great quality, no issues. Easy to construct and look amazing!
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Reviewed in the United States on May 15, 2026
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Connie
Cuba, US
★★★★★ 5
Great looking shelves
Color: Walnut, Size: 47.2"L x 8"D, Set of 2, Color: Walnut, Size: 47.2"L x 8"D, Set of 2
Easy to install because of the included instructions. They look great. They’re stable and they included all of the hardware that you will need for installation. I use them for my plants.
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Reviewed in the United States on May 18, 2026
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Laura Holm
Whiting, US
★★★★★ 4
Decent shelf but could be improved upon
Color: White, Size: 31.5"L x 8"D, Set of 2
Not bad but could be a little more sturdy. We used longer and a little larger screws to try to make it better and that did help but it still has a little wobble in it. It will serve the purpose for me in my bathroom. They look nice except it would be nice if they would include some of those little covers to go over the screws in the bottom of the shelf so you wouldn’t see them. They really show up on the white shelves.
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Dee
Waukegan, US
★★★★★ 5
Clean looking and sturdy
Color: Black, Size: 31.5"L x 8"D, Set of 2, Color: Black, Size: 31.5"L x 8"D, Set of 2
Ordered these to display my mugs. The shelves were easy to install, they are sturdy, easy to care for, and look great.
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Reviewed in the United States on May 12, 2026

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