No it won't...as long as the conveters are still in place and the down stream oxygen sensors are still in place also so the ecm can moniter CAT efficancy. try not to go with to much larger piping as when the flow is changed it may set an cat. eff. code
The 2003 Toyota Tundra V8 is equipped with two catalytic converters. One is located on each side of the vehicle's exhaust system, as the Tundra has a dual exhaust setup to effectively manage emissions from its V8 engine.
The 2008 Toyota Tundra has a V6 engine.
The 2003 Toyota Tundra has a V6 engine.
The 2013 Toyota Tundra has a V6 engine.
The 2007 Toyota Tundra has a V6 engine.
The 2001 Toyota Tundra has a V6 engine.
The 2014 Toyota Tundra has a V6 engine.
The 2012 Toyota Tundra has a V6 engine.
The 2009 Toyota Tundra has a V6 engine.
The 2011 Toyota Tundra has a V6 engine.
The 2010 Toyota Tundra has a V6 engine.
The 2002 Toyota Tundra has a V6 engine.