Ah I feel special. I see I'm in your Siggy!

The 3'' pipe should sound really deep. The V8 guys caim it makes a huge difference.. so I would think it would only help our I6's.

 

heck i couldnt let a comment as unique as that one just go unoticed. that has to be one of the better ones that i had heard lately... that 3'' pipe should sound really deep, that with the high flow cat and a flowmaster or magnaflow, but you dont think that i would loose any power by opening it up that much do ya?

 

the setup from summitt is like the one from checker. wonder what the tube coming off the cat. is for. ive seen this tube on a lot of cat,s

 

i could be wrong so someone correct me if i am but i believe that tube runs to part of the EGR system...not sure though since i havent really paid too much attention to it.. i do know however that my stock exhaust (still holdin up after 128k) has a tube runnin into one of the cats, so that was a big selling point with me on this y pipe. and the fact that it has the O2 sensor bung in it saves me a trip to the exhast shop.. im looking at doing that, and now most likely a full 3'' system after that with a magnaflow muffler for the 300....the only thing stopping me is money, and my next purchase for the truck... a highliner with the cb mount and speakers...cant wait!

 

i see now that summitt is cheaper than checker. and i see the O2 sensor hole, but as for the tube going to my egr, well my egr tube goes straight down and connects to the exhaust pipe in front of the cat. i guess that would be something that would have to modified.

 

Yes, I know you will lose low end torque. I don't believe it will be anything worth worrying about but it's enough to feel. Just use a single pipe, like a diesel.

By the way, I ran a high flow cat and flowmaster muffler before. It didn't sound bad. A magnaflow probably wouldn't sound bad either but I would worry it would be too quiet; magnaflows are expensive to be playing around with. Maybe you should bolt on an 18'' glass pack for a few weeks and see how you like it. If you do, upgrade to a magnaflow. Just a suggestion!

I love your truck by the way. Mean looking stance!

 

thanks bill... as far as glasspacks go...i have heard on the straight six's they sound good if you keep the factory cat's, but since i am removing both and putting in one high flow, somethings telling me that while sounding unique... it would be stupid loud. as far as exhaust goes i want that s**t to open up and roar (as much as it can) when i hammer on it but still be tolerable as this is my daily driver.

 

Bro I just don't want to see you waste your money. Exhaust becomes expensive if you have to keep re-doing your muffler. Try the cheap glasspack route at first. You will be surprised how quiet your big I6 will still be.

If I could recomend anything to you it would be to run a single high flow cat, cut off the other one and run a straight pipe. If that's too loud for you, bolt on a a 12 or 18 inch glass pack. You might not like the packing sound on your I6. If you don't, you can unbolt the glasspack and try a Flwmaster knock off; basically try a baffled muffler.

Everyone likes different things man but let me tell you; If done right, the 300 has a REALLY nice deep and powerful sound to it.

 

the replacement muffler, direct bolt on, from checker is only $38.00

 

A 32'' glasspack is nearly as quiet for even cheaper from Advaned Auto. The glasspack is lighter and uses less space, also. Just throwing that out there. =)

 

A vacuum gauge will tell you if your cats are plugged. My truck recently passed the 200k mile mark and I as far as I know it has the original cats and the exhaust that Ford installed 1995. I hauled a 4100 lb fifth wheel this summer and installed a dash vac gauge to monitor the load on the engine. If a there is a restriction in the exhaust system the gauge will slowly rise from "0" under full throttle acceleration.
My 83 302 cat plugged and I hollowed it out and put a hi flow 3' universal with a short Walker turbo muffler that exited out in front of the rear wheel. Even though my truck was exempt from emission testing it still had to have the factory system in stalled. I think Federal law also requires the emission system to stay intact. I didn't notice any loss of torque off the line. It did increase the mpg from 15 to 17 and it was much stronger from 2500 RPM and beyond. Sounding better = Priceless
regards
rikard

 

I have an 88 f150 with a 302. Used to have an 84 with a 300 six. In michigan we don't have annual checks either. But, I have not had a vehicle with a cat on it. It does clean the air, and give a small amount of backpressure, and last but not least makes a vehicle a touch quieter. I bought my 84 from a friend. It was straight piped because the cat rusted out. I put a turbo muffler on it. Loved it sounded pretty deep, and proved to have more power than straight piped because of the back pressure. My 88' someone cut the cat off in a very clever way- there is an o2 sensor on the first cat. The person cut the cat off but left the o2 sensor, and put a piece of pipe after it. Good welder too I would think. An o2 sensor makes quite a difference on how a vehice runs because it controls the fuel system. I bought this truck straight piped also with no cat (weird huh)? But I put a turbo muffler on this truck too. Sounds good. But figure out a way to keep the o2 sensor if you do have to cut the cat off. And, only if it is a problem being plugged off or something like that. I say this because I heard it is a hefty ticket if you get pulled over for loud exhaust and don't have a cat. Its against the law. So, be careful. I know I am. I am not buying a cat to put on it either. Only paid 500$ for the truck..

 

yes, when a cat is a problem thats when you need to do something about it. But at least yours looks like it has a cat underneath. Not a bad idea to hollow out a cat. Unlike my daily driver! I bet it would be better to be pulled over having it look like you have a cat underneath the truck.

 

well in all fairness to the planet, i am gunna have a cat on it... it will be a high flow one tho... thanks for the advice bill i will probally take that route. i will start off with the new y pipe, and high flow cat straightpipe, then with a glasspack, and go from there.

 

how much pressure should i feel coming out of the tail pipe. i have an old ****** jeep with a 350 sbc and dual exhaust, rear exit, and glass packs with stock manifolds. if i check one side, at the rear, it puts out a lot more pressure than my 4.9.