Swampy Posted May 2, 2018 Share Posted May 2, 2018 This is what I am installing. don't know with the count as long tube or short. Link to comment Share on other sites More sharing options...
HOrnbrod Posted May 3, 2018 Share Posted May 3, 2018 That's a short tube header. The defunct Mopar Performance (Mike Leach) header is the only true long tube header I know of for the 4.0. I think if someone were to copy and market a similar unit for a reasonable price, they would sell all they could make. Link to comment Share on other sites More sharing options...
89eliminator Posted May 3, 2018 Share Posted May 3, 2018 i always thought flowmaster 40s sounded decent on a 4.0. i run one with no cat and it sounds good at idle. high revs sounds like crap, but so does anything on a 4.0. Link to comment Share on other sites More sharing options...
Keyav8r Posted May 3, 2018 Share Posted May 3, 2018 And, of course, must be CHROME! Link to comment Share on other sites More sharing options...
DesertRat1991 Posted May 4, 2018 Share Posted May 4, 2018 15 hours ago, 89eliminator said: i always thought flowmaster 40s sounded decent on a 4.0. i run one with no cat and it sounds good at idle. high revs sounds like crap, but so does anything on a 4.0. The FM50 is pretty smooth up top. And I actually think the sound quality improved when I put the cat back in. Seemed to clean up the raspiness which I wasn't digging at all. Link to comment Share on other sites More sharing options...
DirtyComanche Posted May 4, 2018 Share Posted May 4, 2018 9 hours ago, HOrnbrod said: That's a short tube header. The defunct Mopar Performance (Mike Leach) header is the only true long tube header I know of for the 4.0. I think if someone were to copy and market a similar unit for a reasonable price, they would sell all they could make. Somebody with a good unit to clone and a few bucks could make some money getting the barefoot Chinese children to copy them in 304 SS. Link to comment Share on other sites More sharing options...
HOrnbrod Posted May 4, 2018 Share Posted May 4, 2018 1 minute ago, DirtyComanche said: Somebody with a good unit to clone and a few bucks could make some money getting the barefoot Chinese children to copy them in 304 SS. Yeah, but it would be a crapshoot if they would fit or not. It's really tight, so I'm guessing they wouldn't even be close.. Link to comment Share on other sites More sharing options...
DirtyComanche Posted May 4, 2018 Share Posted May 4, 2018 1 minute ago, HOrnbrod said: Yeah, but it would be a crapshoot if they would fit or not. It's really tight, so I'm guessing they wouldn't even be close.. You get what you pay for with them. I bet if they jigged it correctly they could knock out near perfect reproductions that could retail for $400~. The headers you see on eBay for $74 don't have much hope, you just can't do it for that cheap, especially since the eBay retailer still has a profit margin on that (probably only $7-14 dollars, but still, you can't build that with any degree of accuracy for $60). The Chinese have been making all sorts of fake stuff that you would never know wasn't, aircraft parts are among that... Link to comment Share on other sites More sharing options...
Omarmartinez33 Posted May 4, 2018 Author Share Posted May 4, 2018 Wow thanks for all the replies I got a lot of info out of this. Didn’t know this many people will comment great ideas! Link to comment Share on other sites More sharing options...
NC Tom Posted May 4, 2018 Share Posted May 4, 2018 As long as you keep it "Carbon Neutral". Link to comment Share on other sites More sharing options...
kryptronic Posted May 5, 2018 Share Posted May 5, 2018 On 5/3/2018 at 9:08 PM, DirtyComanche said: You get what you pay for with them... The headers you see on eBay for $74 don't have much hope, you just can't do it for that cheap... you can't build that with any degree of accuracy for $60). Agree completely with this. Check out this thread. I bought an eBay header, returned it and went with a Banks. Pics show eBay header vs Banks header fitment. Link to comment Share on other sites More sharing options...
Eagle Posted May 5, 2018 Share Posted May 5, 2018 On 5/3/2018 at 11:08 AM, 89eliminator said: i always thought flowmaster 40s sounded decent on a 4.0. i run one with no cat and it sounds good at idle. high revs sounds like crap, but so does anything on a 4.0. That's the problem, and unfortunately it's inherent to the design of an I-6 engine. With an I-6, the crank throws are spaced at 120 degrees and the power pulses are absolutely uniformly spaced. At higher RPMs, the exhaust is just a uniform flow, there are no real pulses -- and it's pulses that make an exhaust sound good. That's why I gave up on turbo mufflers for the I-6 decades ago and now I just use OEM replacement mufflers. IMHO, to get decent sound out of an I-6 you need to change the cam to a grind with higher lift, shorter duration, and less overlap, so the individual pulses are more "pulses" rather than "flow." Link to comment Share on other sites More sharing options...
DirtyComanche Posted May 5, 2018 Share Posted May 5, 2018 I forgot about this option. Link to comment Share on other sites More sharing options...
mjcatz Posted May 5, 2018 Share Posted May 5, 2018 On 5/3/2018 at 9:08 AM, 89eliminator said: i always thought flowmaster 40s sounded decent on a 4.0. i run one with no cat and it sounds good at idle. high revs sounds like crap, but so does anything on a 4.0. I've run a Flowmaster 40 for a while on my MJ. I would agree, sounds great at idle, but the tone gets really muddy at higher revs. Link to comment Share on other sites More sharing options...
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