Exhaust Systems....Researched

mrnickleye · 04-02-2007, 04:22 AM

Well, it is estimated that going cat back , and larger pipe (2 1/2" in our N/A's), will get you about 5-10 hp.

In alot of cars, it is estimated that putting headers on will get you about a 10% gain. But that because those cars had restricted exhaust manifolds.

The N/A motors have a nice, free flowing, and light-weight manifold from the factory. Toyota spent a lot of time and $$$ developing that manifold to give you the best "bottom-end" torque, with out a big loss on the top-end.

I still have my factory one on. I drive it every day, city mostly.

As you read in the first post, "Before this exhaust mod, the car would max out at 125mph.

After this mod, I can easily go 145mph any time I want."""""

Some of the other folks here may be able to tell you about their experiences with headers, and what gains they have gottn,

04-02-2007, 04:22 AM	#37
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Well, it is estimated that going cat back , and larger pipe (2 1/2" in our N/A's), will get you about 5-10 hp. In alot of cars, it is estimated that putting headers on will get you about a 10% gain. But that because those cars had restricted exhaust manifolds. The N/A motors have a nice, free flowing, and light-weight manifold from the factory. Toyota spent a lot of time and $$$ developing that manifold to give you the best "bottom-end" torque, with out a big loss on the top-end. I still have my factory one on. I drive it every day, city mostly. As you read in the first post, "Before this exhaust mod, the car would max out at 125mph. After this mod, I can easily go 145mph any time I want.""""" Some of the other folks here may be able to tell you about their experiences with headers, and what gains they have gottn, __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.