Does factory NPP exhaust have resonators ? - Page 4 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jims73z · 10-02-2013, 12:40 AM

Ok then.
Today I finally hooked up vacuum to the mufflers without a switch. The valves react slowly so driving home on freeway they don't open. The. Npp
mufflers sound a little better than the stock ss. No drone. I bought the mechanical switch from the 50 dollar thread but am instead looking at using a vacuum solenoid from another source.I will keep up on this thread. Without the resonators or vacuum the npp dual mode can be too loud even on a stock car.

10-02-2013, 12:40 AM	#43
Jims73z Drives: 1973 z28 Rs , 2012 SS/Rs Blk/Blk M6 Join Date: Oct 2009 Location: Laguna Posts: 197	Ok then. Today I finally hooked up vacuum to the mufflers without a switch. The valves react slowly so driving home on freeway they don't open. The. Npp mufflers sound a little better than the stock ss. No drone. I bought the mechanical switch from the 50 dollar thread but am instead looking at using a vacuum solenoid from another source.I will keep up on this thread. Without the resonators or vacuum the npp dual mode can be too loud even on a stock car. Last edited by Jims73z; 10-02-2013 at 10:02 AM.