Aftermarket exhaust parts and the engine. However, the pipes do "ring" with the exhaust pulses and increase underhood noise. Headers can be ceramic coated to reduce the heat radiated in the engine compartment, and to increase the temperature of the pipes which increases the velocity of the exhaust gases. Terminology: Catalytic converters are necessary to reduce emissions but create back pressure due to the exhaust gases being forced through a catalyst, and therefore decrease high-end engine power. Many modern catalytic converters only produce 1-3 psi of back pressure, though this restriction worsens further with use. Hi-flow catalytic converters can replace the standard units
Coalition to Reduce Spending Conservative" criticized signatories writing that a "statutorily required balanced budget is a stupid idea, and that anyone who signs this new pledge is terrifically insane and should therefore be disqualified from public office. Other than that, it’s a significant improvement on Norquist’s porous pledge." Ramesh Ponnuru, senior editor at "National Review", wrote "while I wish it could be done, I don’t think it’s possible to pledge our way to lower spending." The organization is funded entirely through private donors and corporate contributors. Coalition to Reduce Spending Coalition to Reduce Spending is a non-partisan political advocacy group based in Alexandria, VA,