did 86 trucks come with true duals or a y pip set up
 

Did 1986 chevy trucks come with a true dual exhause with 2 cats. Or a single y pipe set up. The guy i bought the truck from just has separate pipes from each manifold going to two cheap mufflers.

Re: did 86 trucks come with true duals or a y pip set up
 

stock they came with 2 cats and a Y pipe setup with the pipe exiting on the side behind the passanger rear tire.


i believe thats how it is.

Re: did 86 trucks come with true duals or a y pip set up
 

1/2 or 3/4 with light duty emissions, v8 gas engine - Single exhaust with two pipes from muffler back both exiting driver's side (not passenger).

3/4 or 1 ton with heavy duty emissions (no cats) duals with exits on both sides.

Diesels - duals exiting each side.

Re: did 86 trucks come with true duals or a y pip set up
 

Gracho is right on ,Y-pipe to single exhaust, my 83 came that way and I would run the true dual exhaust like you described, had a friend of mine pull the exhaust pipe at the manifolds and run duals with 40 series Flows, when it came time to smog I would throw the original exhaust back up, the older I got the more of a hassle it became so now i'm running a single 3" exhaust with a 3" cat and 3'' in and dual 2.5 out Flowmaster dumped in front of the axel :metal:
John

Re: did 86 trucks come with true duals or a y pip set up
 

2WD, or 4WD....?

My 86 4X4 came with 350 HD emissions, had a y-pipe with 1 cat, and single outlet on drivers side, behind rear wheel

Duro

Re: did 86 trucks come with true duals or a y pip set up
 

My truck 84 GMC Sierra Classic and the son's 86 Silverado came with a "Y" pipe and a single catalytic convertor under the passenger side. This went to a single muffler and then out the passenger side at the rear fender. That did not last long in my world. There are headers, a connection underneath to a "H" pipe and then to dual Flowmaster mufflers and out the back through "MEGS" stainless tips. We don't have smoggies here.

The upgrade would be to use a "X" crossover pipe, rather than the "H" design, but I will wait for old age to take out the pipe first.

Re: did 86 trucks come with true duals or a y pip set up
 

whats a good set up smog legal headers for california.

Re: did 86 trucks come with true duals or a y pip set up
 

I don't think any of our trucks that came with a cat had the cat on the passenger side. I know my 85 came with a y-pipe and the cat was on the drivers side.

Re: did 86 trucks come with true duals or a y pip set up
 

I can't vouch for the later trucks but that makes sense. The frame has a "flare" in it to accomodate the cat on the drivers side. I don't think they ever changed that.

Re: did 86 trucks come with true duals or a y pip set up
 

I bought an '85 new and it was set up as a Y pipe into a single cat and then into a muff and dual out and exit the driver side.

I also bought my '87 new and it was exactlly the same set up as the '85.

So i don't think Chevy would of changed the entire exhaust system for one year and put it on the other side or as dual set up.

Re: did 86 trucks come with true duals or a y pip set up
 

My son's truck and mine both were on the passenger side. I know this very well, since I had to remove all of the damnable metal shielding along with the cat in my changes to the trucks.

Re: did 86 trucks come with true duals or a y pip set up
 

True duals is the only way to roll. Got no smog testing up here so nothing to worry about.

Re: did 86 trucks come with true duals or a y pip set up
 

What years are they?

Re: did 86 trucks come with true duals or a y pip set up
 

Mine is an 84 GMC Sierra Classic SWB and his is an 86 Cnevy Silverado SWB.

Re: did 86 trucks come with true duals or a y pip set up
 

My 86 Silverado has got a Y pipe no cat goes into muff and comes out dual and one pipe goes out each side ;)

Re: did 86 trucks come with true duals or a y pip set up
 

Everyone I have seen that was stock. Has the manifolds, y pipe, then catalytic convertor on the driverside, intermediate pipe, over the axle pipe and then muffler with dual tail pipes on the driverside.

I did seen a hd 3/4 ton. It has stainless steel manifold but more like shorty headers, dual pipes down each side, not catalytic convertors, two mufflers, tail pipes 90ed behind the tires.

Re: did 86 trucks come with true duals or a y pip set up
 

On my 85 it was Y pipe, then ran dowm the drivers side into a cat and then a muffler and then exit in two pipes coming out be hind the drivers side rear tire. That was stock.
on my 84 the y pipe and pipe ran down the passangerside into a cat then a muffler.