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.

Click on the Product Category Listings at Top Left or a Featured or Bestseller image to view the Full Product Descriptions

Featured Products

More Info

SKU: GenII

$450.00 $400.00

Gen-II SAIS Bypass Kit

(5.0 on 21)

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.

Select Your Vehicle, Year, Engine:

Tundra, 2007-2019, 5.7L(3UR-FE Non-Flex Fuel, 3UR-FBE Flex Fuel) G2-2B57H1Tundra, 2010-2013, 4.6L(1UR-FE) G2-2B46H2BTundra, 2014-2019, 4.6L(1UR-FE) G2-2B46H2Tundra, 2007-2010, 4.0L(1GR-FE) G2-2B40H4Tundra 2011-2014, 4.0L(1GR-FE) G2-1B40H2Tundra, 2007-2009, 4.7L(2UZ-FE) G2-2B47H2Tacoma 2005-2019 2.7L(2TR-FE) G2-1B27H7Tacoma, 2012-2015, 4.0L(1GR-FE) G2-1B40H3 5.7PSequoia, 2010-2012, 4.6L(1UR-FE) G2-2B46H2BSequoia, 2008-2009, 4.7(2UZ-FE) G2-2B47H2Sequoia, 2008-2019, 5.7L(3UR-FE, 3UR-FBE Flex Fuel) G2-2B57H1Landcruiser, 2008-2011,2013-2019, 5.7L (3UR-FE) G2-2B57H1Landcruiser Prado, 2008-2012, 4.0L(1GR-FE) G2-1B40BGX460, 2010-2013, 4.6L(1UR-FE) G2-1B46H2BGX460, 2014-2019, 4.6L(1UR-FE) G2-1B46H2LX570, 2008-2011,2013-2019, 5.7L(3UR-FE) G2-2B57H1FJ Cruiser, 2013-2014, 4.0L(1GR-FE) G2-1B40H2 5.7P4Runner, 2013-2019, 4.0L(1GR-FE) G2-1B40H2 5.7P

More Info

SKU: GenII-3V

$450.00 $400.00

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.

Select Your Vehicle, Year, Engine:	Tundra, 2005-2006, 4.7L(2UZ-FE) G2-3V47H8Sequoia, 2005-2007, 4.7L(2UZ-FE) G2-3V47H8Landcruiser, 2006-2007, 4.7L(2UZ-FE) G2-3V47H8GX470, 2005-2009, 4.7L(2UZ-FE) G2-3V47H8LX470, 2006-2007, 4.7L(2UZ-FE) G2-3V47H84Runner, 2005-2009, 4.7L(2UZ-FE) G2-3V47H8
Harness Type:	*Standard Harness, not 100% Plug and Play but does not require intake removal for install. *Plug and Play Upgrade - Made to Order, Requires Intake Removal (Add $30.00)

More Info

SKU: V36HPPP

$404.00 $335.00

2005 - 2007 Plug & Play Bypass SAIS Kit w/ PPP

(5.0 on 4)

Plug and Play Combo Kit includes the Hewitt-Tech SAIS Bypass Plug and Play Module and a SAIS Pump Proxy Pack. Click here for more details!

Select Your Vehicle, Year, Engine:

Tundra, 2005-2007, 4.7L (2UZ-FE) V3647HPPPTundra, 2007, 5.7L (3UR-FE) V3657HPPPTundra, 2007, 4.0L (1GR-FE) V36H40PPP4Runner, 2005-2007, 4.7L (2UZ-FE) V3647HPPPSequoia, 2005-2007, 4.7L (2UZ-FE) V3647HPPPTacoma, 2005-2006, 2.7L (2TR-FE) V3627HPPPTacoma, 2007, 2.7L (2TR-FE) V5427HPPP (Add $90.00)Lexus, LX470, 2006-2007 4.7L (2UZ-FE) V3647HPPPLexus, GX470, 2005-2007 4.7L (2UZ-FE) V3647HPPPLandCruiser, 2006-2007, 4.7L (2UZ-FE) V3647HPPPHilux, 2005-2007, 2.7L (2TR-FE) V3627HPPP

More Info

SKU: V36H

$259.00 $190.00

2005 - 2007 Plug & Play SAIS Bypass Kit

(5.0 on 52)

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

Select Your Vehicle, Year, Engine:

Tundra, 2005-2007, 4.7L (2UZ-FE) V3647HTundra, 2007, 5.7L (3UR-FE) V3657HTundra, 2007, 4.0L (1GR-FE) V3640H4Runner, 2005-2007, 4.7L (2UZ-FE) V3647HSequoia, 2005-2007, 4.7L (2UZ-FE) V3647HLexus LX470, 2006-2007, 4.7L (2UZ-FE) V3647HLexus GX470, 2005-2007, 4.7L (2UZ-FE) V3647HLandCruiser, 2006-2007, 4.7L (2UZ-FE) V3647HTacoma, 2007, 2.7L (2TR-FE) V5427H (Add $40.00)Tacoma, 2005-2006, 2.7l (2TR-FE) V3627HHilux, 2005-2007, 2.7L (2TR-FE) V3640H