Sale

Tomei

Single Scroll Ball Bearing Turbocharger Kit

$1,780.00 $1,602.00 Save $178.00

SKU: TOMTB403A-SB01D

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Tomei TOMTB403A-SB01D is a B/B (Ball Bearing) Turbocharger Kit from the ARMS BX7960F series, engineered for Subaru EJ20 and EJ25 single scroll engines. This turbocharger is designed to support a target of 400 horsepower and features a ball bearing design for improved spool and durability. The compressor wheel is constructed from A2618 material and produced via CNC billet process, measuring 52.6mm in diameter (inducer) and 68mm (exducer) with a 60 trim and 6/6 blades. The turbine wheel is cast from K418 material, with dimensions of 61.0mm (inducer) and 54.0mm (exducer), featuring a 79 trim and 9 blades. The kit includes compressor housing with a 0.78 A/R and a turbine housing with a 0.57 A/R. This turbocharger kit is specifically designed for Subaru WRX and WRX STI models equipped with single scroll EJ20 or EJ25 engines. The initial boost setting is configured at 1.0 kgf/cm2, and the kit is supported by a comprehensive manual and repair parts list available from Tomei.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandTomei
Part NumberTOMTB403A-SB01D
CategoryAir and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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