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#1
06-29-2024, 12:39 PM
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Exhaust Cut-outs DUMP LEGS
The headpipes on my car are nearly finished with there service life. I'd like to replace them with the 2.5 inch headpype from Pypes and then add the Dump Legs.
The caps then could be opened off the end of the headpipes enabling the exhaust to exit completely straight . This seems like a good approach and I would use the caps without the electric kit. I'm trying to coax my stocker towards 13.50. Am I on the right track here with this set-up? . See illustration., thanks 
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#2
06-29-2024, 04:13 PM
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1968 Firebird IAIIa 522 340 E-heads Northwind with XFlow TBI 4L80E 3.50:1 Rear 1969 Firebird 350/TH350 Mostly stock 2.56:1 Rear 
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#3
06-29-2024, 10:05 PM
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That's a good video and with quite surprising dyno results. I'm comfortable with how to move forward. Thanks
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#4
08-07-2024, 09:32 AM
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NYGTO You got me thinking.
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#5
08-07-2024, 03:52 PM
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I put those on my Buick 455 over ten years ago. I have electric cut outs and would do it again. Its 3" through the cutouts and 2.5" x-pipe and muffler.
  https://youtu.be/5lQ2fpHvCSE?si=n6fZCKgFVqN4gFzV
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__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6"  The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
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#6
08-08-2024, 02:18 PM
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I have electric cutouts on 5 cars and cutouts ready to accept more electric doors on 3 more.
One of the best bolt ons I've put on a car. |
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#7
08-13-2024, 11:25 AM
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what cutouts are you using? where from?
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Jim Moshier 1971 Grand Prix 462ci SD Performance 6x heads 1962 Catalina 389 1968 Firebird 400-455 I haven't decided "If we ever forget that we're one nation under GOD, then we will be a nation gone under." - Ronald Reagan |
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#8
08-13-2024, 03:47 PM
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72 Luxury Lemans nicely optioned 
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#9
08-13-2024, 07:25 PM
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I've had DMH's on my Chevelle for about 25 years now and they've been flawless.
I used to live up the street from Dave. Back then he ran his shop on his property and I'd just drive over and pick them up. Super nice guy. |
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#10
08-13-2024, 07:29 PM
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Oops sorry didn't see your other question.
I have DMH on the Chevelle, Quick time on all the other cars except one, that one has a set that Jegs sells under their name. Those kind of slightly leaked a little when first put on but carbon buildup seems to have sealed them up now LOL. They all work great though. Quick Time seems to be easier to get as most places sell them. I don't think Dave sells his brand at any of the vendors, it's only straight from him if I remember correctly. But they are nice pieces. Only thing that turns me off from DMH now that I don't live close to him, as I need another set for another car I'm working on, is that he doesn't take credit card. Only paypal or something like that, and I don't do paypal anymore. |
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