ZZP 3800 Equalizer Downpipe

ZZP 3800 Equalizer Downpipe

ZZP 3800 Equalizer Downpipe

Regular price $499.99
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The ZZP 3800 Equalizer Downpipe is the solution to perfecting your 3800 build. We all know how potent the 3800 platform can be, however there's always been one thing that has held them back; sound. Even with a great exhaust combo it's been nearly impossible to get FWD 3800's to sound good due to the crossover pipe causing unequal exhaust pulses resulting in rasp. After multiple revisions, many prototypes and miles on the concept we've come up with the perfect solution to make that 3800 sing. This product essentially changes the stock unequal length setup to an equal length exhaust. 

Our equalizer setup includes our unique crossover tube, rear manifold block off plate, and the primary downpipe. This setup requires a TOG style downpipe which can be found here: TOG downpipe. The TOG downpipe will connect between our primary downpipe and your catback. Fits stock front and rear manifolds and ZZP power logs; does not fit cars running stainless header package. You will likely want to add a 3" 2 bolt gasket, found here.

9.2022 update: We have fitted an equalizer to an H-Body Bonneville SSEI in house. It will physically bolt up, however the stock intake tube contacts the crossover. We are currently working on a solution. 


  • Equalizer Crossover
  • Primary downpipe
  • 2.5" v-band clamp
  • Rear manifold block off plate
  • O2 bung plug
  • Hardware necessary for installation

Check out the videos below for sound clips. While these clips do a good job of catching the tone difference, it's hard to truly capture how much better this setup sounds over a "standard" exhaust. We know you're going to fall in love all over again with your 3800 car as soon as you get this installed. 

Although a resonator is now not as essential with the equalizer, it is still recommended for reducing drone. 

Disclaimer: Installation can be difficult/time consuming due to clearances around the throttle body and other components. Be patient and take your time. See our video down below for installation tips, if you have any questions further than that please email customerservice@zzperformance.com. 







Grand Prix: 1997*, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007

Regal: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

Monte Carlo: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005

Impala:  2000, 2001, 2002, 2003, 2004, 2005

H-Body: All Series II H-body cars with catback modification

* 97' style ABS modules will cause clearance issues. Will require modification to fit.


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