For more information, see the Dyno Results section. No codes have been set due to aftermarket modifications. This is an issue of local laws and regulations. In Filter are emissions legal in 50 states. The Hotshot Exhaust Header and Powerstack are pending application.
Every state has different laws and regulations concerning emissions and aftermarket modifications.
It is our customers' responsibility to understand how a purchase from SPS will affect them with respect to those laws and regulations. In other words, through the use of less restrictive plumbing, they allow a larger volume of fuel and air to enter the engine and a larger volume of exhaust gases to exit the engine. The larger volume of fuel and air within the combustion chamber leads to more power. For a complete explanation of dyno testing results, go to the Dyno Results section of our web site. Many aftermarket manufacturers and dealers mistakenly feel that they must exagerate the results that their products deliver in order to elicit sales.