1979lee Posted September 27, 2013 Report Share Posted September 27, 2013 Hey all. Well my 97 lumina's running well now at 79k. and I'll be getting the duel outlet exhaust soon. there's a few monte and lumina;s at the junk yard with those right now. but i searched this site and i see that these cars have a real POS tiny downpipe. now my car is a 3100 v6. and Bone stock. i mean chalk marks and everything. so how can i "fix" this tiny dp? are there any factory dp's that flow well? it looks like a very tight fit. so how big can i go with the pipe size, how big a pipe do i need? what is the pipe size now? i read that its dbbl walled and like 1.5 inside? wow thats small. 3100 be exhausting through a "c" battery sized pipe is TINY:D this is my daily driver. and car for the next 100k or more. my plan would be to take off the down pipe and CATCON and go to my favorite mufller shop and have the pipe upped to single wall and what 2.25 inches? will that work thank you all in advance Quote Link to comment Share on other sites More sharing options...
redgrandprix Posted September 27, 2013 Report Share Posted September 27, 2013 2 or 2.25 sounds alright but more than likely you will have to fabricate a downpipe but don't get carried away with pipe size, as a N/A car you want some backpressure otherwise you may lose torque Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted September 27, 2013 Report Share Posted September 27, 2013 Unless your going to build the motor, stay with 2.25". 2.5" would be way to big for a stock motor. Your gonna have to go custom. Unless you can find someone selling one. Quote Link to comment Share on other sites More sharing options...
1979lee Posted September 27, 2013 Author Report Share Posted September 27, 2013 thanks for the info guys. no i do not plan to build the engine. so 2.25 it will be. how bad/hard is it to get the bolts off of the dp flange? it looke SMALL under there. can i get to the bolts from the top under the hood. my plan was to take the whole she-bang (dp and catcon)off the lumina and have the new larger pipe fitted at the muffler shop. ive added some pic's ive had and found. pic #5 is what id like to have done and welded up Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted September 28, 2013 Report Share Posted September 28, 2013 This is mine thats currently on the car, until I get headers Since yours is automatic, easiest way to get to the bolts (that I found) is to get them from under the car. Jack up the front enough where you can move around under the car. They are both 15mm bolts. Youll need about 2feet in extensions. 3/8" works fine, if you need more, use 1/2" ratchet. Youll have to go over the PS rack, and on the drivers side, go over the PS rack, and under the PS lines. Youll see what im talking about when you see it. those bolts are going to be dry, and they have a spring applying pressure on them. So dont expect them to come right off. Itll take a little bit. Quote Link to comment Share on other sites More sharing options...
l67ss Posted September 28, 2013 Report Share Posted September 28, 2013 You know 98-03 gp gts hav a better dual muff setup and you can use the same hangers i hav 2001 gp gt le exhaust on my 97 monte Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.