Kerker vs Marks 4-2-1?

[grimmie]

It's been a long time since I've heard the Kerker and never heard Marks exhaust in person. What's the difference in sound/volume between the Kerker and Marks 4-2-1?

Thanks

 

[Rollie]

It's been a long time since I've heard the Kerker and never heard Marks exhaust in person. What's the difference in sound/volume between the Kerker and Marks 4-2-1?

Thanks

Good question , I've heard them both and like the sound a little better from the Marks , even though I have Kerkers . Another good question after this one is answered completely is : How do they match up on the power side / dyno test ? This question has been out there a while and don't believe it has been proven yet ???????

 

[Rand-5107]

My stock 88 with kerker and stock k-1 can.
107.37 hp and 73.76 torque.
Less than 60 miles later marks 4into1 with his 14" can.
116.66 hp and 78.18 torque.
Was dynoed at full throttle motorcycle shop here.
Kerker 6/5/2010 temp. 97.56 humid. 22%
Mark's 7/9/2010 temp.79.71 humid.45%
I bought the bike new $6250.00 out the door. Valve covers have never been off. Carbs. still have the adjustment plugs in. Only reg. Oil&filter, coolant changes. I put the kerker on in 89' for more clearance while lane splitting in S.F. bay area traffic. Both pipes run rich, about 12to1 from 5600 rpm to red line. they dip down to 10to1 between 3500-3950 then the kerker takes from 3950 to 5600 to rise back to 12to1 the mark's rises to 13to1 at 4700-4900 then back to 12to1 at 5600