i wanna hear some 305 vortec with flowmaster straight piped

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silverado98

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thinking of doing mine cause my cat is making clanging noise now it juststarted so let me hear what it soinds like thanks guys
 

silverado98

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know one has videos of there 305 vortec with straight pipes and Flowmaster muffler I just want to get some ideas I went on YouTube but mainly 350
 

Dylan1991_1500

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Well I guess I am confused because if you have a Flowmaster then you are not really straightpiped and if you are straightpiped you really aren't Flowmastered. You can't have both.
 

Justin S

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you could make yourself a true dual exhaust, and straight pipe one side, and put a flowmaster on the other for a unique sound.
 

kennythewelder

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The OP is trying to ask about removing the cat, and replacing it with a straight pipe, and then a flow master after that. After looking at his profile page, he has a 98 with a 305. To remove the cat, he will need to ether tune out the rear 02 sensor, or sensors, or do what I did, and add a mini cat simulator to fool the rear 02 sensor, or sensors. I built mine just like these with some spark plug spacers, and some honey comb from my old cats. I know the 350s have 2 pipes going into 1 muffler, making dual exhaust an easy mod. Is the 305 the same way, IDK. After gutting my cats, I have had my mini cats on my truck for about 1 year, and I never had an issue with them. Anyway here is a link where you can get the mini cat simulators. http://www.bigdaddiesgarage.com/mini-cat-cel-fix.html
 

GMC1994K1500SierraSL

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I have a 305 with no cats and a magnaflow, I will post a video later, I personally don't like flow master as they are baffled and restricting, i only use magnaflow in all my trucks


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