Welcome To the Hewitt Technologies Inc. Store.

Home of the Hewitt-Tech Toyota/Lexus Secondary Air Injection System Bypass Kits. These kits offer a cost effective solution for the failure prone Secondary Air Injection Systems found on certain Toyota truck and SUVs. The bypass kit can prevent many of the trouble codes caused by a mechanical failure of the secondary air pump or a secondary air valve saving you as much as a $2000-$4000 on a repair bill, turn off your CEL and keep the vehicle out of limp mode. The kit is not a fix all solution so check our codes section and installation instructions for more info on how the kit can help you. You can also use the Contact Us page to contact us with any questions regarding the bypass kit, shipping or your trouble codes.

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Featured Products

SKU: V36H

2005 - 2007 Plug & Play SAIS Bypass Kit

52 Review(s)

The Hewitt-Tech SAIS Bypass Kit Plug and Play prevents operation of the SAIS at cold start thus letting you clear your related trouble codes, the CEL and Limp mode and installation ma

$259.00 $190.00

Select Your Vehicle, Year, Engine:

SKU: GenII

Gen-II SAIS Bypass Kit

21 Review(s)

The best solution available. Emulates the entire system by replacing the air injection control driver(s). Require good pressure sensors or PSO but no other kit add-ons are needed for codes like the GenI units.

$450.00 $400.00

Select Your Vehicle, Year, Engine:

SKU: GenII-3V

Gen-II SAIS Bypass Kit (3-Valve)

The GenII unit for those 4.7L vehicles with the SAIS located completely underneath the intake manifold. To make 100% plug and play requires removal of the intake manifold otherwise requires 3 wire tap connections to be made at the ECM.

$450.00 $400.00