Finally got my 1990 k5 blazer running and moving howver it sounds like a pile ahaha. It has headers/true dual exhaust its all rotted I was able to fix up to the mufflers I am having trouble finding tail pipes to go over the rear axle both sides any suggestions appreciated.
CK5
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1990 K5 Blazer Exhaust need some hep.
- Thread starter jws789
- Start date
Most of the time I have a local exhaust shop do the exhaust for me. They bend it to fit and for the most part they do it for what I can buy the parts to do it myself. If you must do it yourself, ther e may be a kit available of some kind I don’t know. In the past I have cut prebent elbows and welded them together to make it fit.
No factory options and aftermarket limited .
Have a shop make up a nice system and be done . Go out the sides 90* NOT out the back . If the top is open or window down you get exhaust in the cab this way .
Is it still efi ? If so is there a O² sensor in the system ?
Have a shop make up a nice system and be done . Go out the sides 90* NOT out the back . If the top is open or window down you get exhaust in the cab this way .
Is it still efi ? If so is there a O² sensor in the system ?
When I did my 454 swap into my '90 K5 I just had a shop do it. I had cast manifolds and bought a flowmaster. Dual 2.5" into the muffler, single 3" out the driver's side behind the tire. Shop charged me $750 which I thought was reasonable for custom work, and it fits right.
750 wow thats crazy . Was it stainless steel ?
Thats very reasonable/cheap in my neck of the woods to have a quality shop do the work. Midas would be cheap but it would look like a$$.
No. Nothings cheap these days. Material plus several hours labor and overhead. Thats a good deal.
Yes i was going to go out the sides once it got over the axles I thought about going out the back thanks for that info tho didnt know that. Yes it is a EFI Not sure about 02 sensors i gotta look dont remember seeing them. I am trying to avoid taking it to a shop as I am fixing this truck on the cheap plus not many exhaust shops around my area. I found one possible system on rockauto for 200 I may be able to make work just figured maybe someone on here had a kit they used.
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I used a hooker brand dual kit years ago, it fit up awful but worked. Find a methy local shop and hit them up at the end of the month when they are desperate for work to make the bills 
this would do the job but the price is BS
Its flow master aka holley brand so that is 1 reason its high price .
I am going to try to make this work i think I wont need everything in the kit but has tail pipes.
That looks like it’s workable.
I like that kit and price . I would use it as a builder kit .
But i need 2.5" and a 3" tail in a kit . I will have to go look .
But i need 2.5" and a 3" tail in a kit . I will have to go look .
Heartthrob makes a manifold back dual exhaust kit 2.25”. You can search on youtube to find videos of it. One of the kits is #4805
RayzWorld
Registered Member
I would recommend letting a shop do the exhaust for you, I'm going to redo my exhaust for my 86K5 as well. I have seen some prebent full exhaust systems on LMC.com, although I think it might be out of your price range. Summit has prebent pieces if you want to check those out.
actually that doesnt look bad may just get that price isnt to bad either.
