7 or 8 inch exhaust

4-States sells a kit for your truck but does not list it on the website or the cat. call and tell them exactly what you want and they will ship it to your door.Or tell them when you'll be there to pick it up. They install also.

 

7 inches with quiet inserts inside, the inserts are five inch straight through.

 

If your looking to keep stock elbow location, I had 6" on my last w9 with no problems. Buddy of mine has 7" and had to trim bottom of cab a little. When you order check with them, I think it's grand rock that has a flat spot in elbow to help with cab clearance

 

kenworth has 3 different elbows for the aerocab. dynaflex has a pipe kit for 7 inch. you can give them your vin# or the elbow# and they will figure it out for you. it comes with everthing you need to mount them.

 

Try Triple R

 

another option that I like on the KW's is the Pickett Elbows that they are using on the Petes,like in the pic from GP1800 above,I'm starting to see a few of those. Also call Triple R in Tx. They do excellent exhaust work.

 

Call Chrome Depot;Mantua,Ohio they get seconds and firsts from Grand Rock may be able to save yourself some money.