Exhaust cut outs - Alfa Romeo Bulletin Board & Forums
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post #1 of 12 (permalink) Old 04-20-2019, 05:36 AM Thread Starter
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Lightbulb Exhaust cut outs

Have a 74 GTV planning to use exhaust cutouts after header any thoughts?
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post #2 of 12 (permalink) Old 04-20-2019, 06:24 AM
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post #3 of 12 (permalink) Old 04-20-2019, 06:38 AM
Richard Jemison
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Thoughts?

From the point where two down pipes merge into one you need at least a 30 inch collector run before any change, whether it be a muffler or cutout or step up to larger exhaust outlet pipe.

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post #4 of 12 (permalink) Old 04-20-2019, 12:37 PM Thread Starter
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I think I’ll stay with the 60mm outlet pipe all the way to the end what do you think if I install a cherry bomb along the way to deaden the sound just a bit 60 mm of coarse in between the header and the outlet exhaust pipe
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post #5 of 12 (permalink) Old 04-20-2019, 02:11 PM
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Are you thinking of those horrid things they have on 'supercars' where you flick a switch and a valve opens to bypass all the mufflers? IMO they should be illegal on any road registered car ... driving a supercar already implies you are a ****, why allow them to prove it?

Hmmm ... glad I'm not your neighbour.

We already have to listen to a Harley warm up for 5mins. As I despise the sound of the worlds worst engine (the Harley v twin), it takes all my self control not to go ape **** at the neighbour ...
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'71 1750 Series 2 GTV:
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156 Series 1 v6 ... and remember it's all just opinions
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post #6 of 12 (permalink) Old 04-20-2019, 07:42 PM
Del
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Nah, Alfa spent a lot of time and money to get the "Alfa Sound" just right, and you want to screw it up? Will certainly be louder but not any faster. Not an attribute.

Sorry, but you did ask.

Del

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1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27

previously owned since 1964:

62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6

Last edited by Del; 04-20-2019 at 10:59 PM.
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post #7 of 12 (permalink) Old 05-09-2019, 08:51 PM
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The original GTA's had a side dump pipe that connected from the GTA tube manifold, and exhausted out the side in front of the rear wheel. Hard on the driver's left ear - you really need ear protection. The combination was well tuned for the high reving 1600 GTA motor.

Most of our race tracks in CA have severe noise limits - I've seen a few cars black flagged for noise - so a good exhaust with at least a good front muffler (resonator) will be needed. 2 to 2 inch tubing will give you good flow with little back pressure.

Robert

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post #8 of 12 (permalink) Old 05-10-2019, 02:10 AM Thread Starter
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Thank you for info much appreciated
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post #9 of 12 (permalink) Old 05-10-2019, 03:39 AM
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Kenny-

Get the magnaflow. That's what I run. You like my car's sound...

Current: 69 GTV, 2019 Stelvio, 95 Porsche 968 cab
Past 74 GTV, 69 GTV, 74 Spider
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post #10 of 12 (permalink) Old 05-10-2019, 08:10 PM
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I saw this being developed. Beautiful in polished stainless steel. Fits perfectly. Uses appropriate large tubing with beautiful welds! Sound is not the same as the unique 1600 Alfa Note, but good. You can use a rear muffler or a straight stinger. Better performance than a cut-out either way, and you will not trigger the neighborhood's car alarms!

Good Luck.

Robert
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post #11 of 12 (permalink) Old 05-10-2019, 08:12 PM Thread Starter
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Where and who ?
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post #12 of 12 (permalink) Old 05-10-2019, 08:40 PM
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I think one of our usual sellers has them. May need to be made-to-order, but Magnaflow (go to corporate web site) uses computer controlled bending machines. It may take a few (or a lot of) calls, bur persist - these are magically good.

Robert
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