Bet if you looked hard enough you could find one of them with stacks too!

 

Ok lets see, 5.9 Cummins, inline 6 cylinder, so you gonna do a split exhaust manifold and do duals. Last time i seen them done was on an old Chevy PU, sounded like a ****** off bummblebee, sorry Russell, one 6" stack and see if ya can fill it, if ya can put a flapper on it to keep the rain out.

 

The problem with that is that many pulling associations are following DHRA rules or modeling their own rules after the DHRA rules. Whether its a full on Modified truck or a Work Stock puller according to DHRA:

"Exhaust:
All vehicles must be equipped to direct exhaust upward. The exhaust must exit rearward of the driver's compartment. If the muffler or catalytic converter have been changed from stock, two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other as close to the turbo as is practical."

 

x2..............

 

jfaulkner, i guess i dont understand the big deal. Are you driving the trucks? Who cares what other people have on their trucks? I could care less what someone elses truck looks like personally. just my 2 cents

 

for a competition rig, definately do a single stack w/ one 90* bend. better performance than restrictive duals

 

Most pulling associations will not allow a turn out or a flapper. The exhaust has to be straight up, open, and cross bolted. This is for tractors or trucks.

 

If it's not going to be driven on the street then i would definately go with 1 stack through the hood

 

two 8inch stacks with purple flappers along with 5inch duals with yellow flappers and maybe a 3inch hood stack with a pink flapper

 

If you run it out the hood most places will make you pull with the trucks that run GOOD lol not the so called street class

 

one 90* bend as in one 90* bend coming up through the bed and straight up...

vs. those hokey single stack kits that have three 90* bends in them

 

ok guys, i went with 2 6" black stacks. sometimes i put rain caps on, most of the time i don't.

 

flappers are awesome!! ill eventually go with that look when or if i get tired of the stacks i have now.

 

SINGLE 7" DUDE!!!!!!!!!!!!!!! ALL THE WAY!!!!!!!!!!!!!!!!
just right of the slider and level with the cab.

 

I like the look of Dual stacks. But nothing looks better then black coal shooting out of a single stack.