1 5/8 Or 1 3/4 Longtubes

Discussion in '1994 - 1995 Specific Tech' started by Stangin95, Jul 10, 2014.

  1. Stangin95

    Stangin95 New Member

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    I have the stock block and stock heads on 95 302, and am wanting to go with a new exhaust setup for now, thinking about mac prochamer and mac long tubes but dont know what size to get 1 and 5/8ths or 1 and 3/4s and will be going with 2 and 1/2 collectors
     
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  2. 85rkyboby

    85rkyboby Active Member

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    I wouldn't get macs. It's funny you posted this as I was just about to post the same question but pertaining to a 347. My macs rusted out pretty quick.
     
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  3. 84Ttop

    84Ttop They make new pistons every day, so why worry?
    SN Certified Technician Mod Dude

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    Stock cylinder heads will be the deciding factor here. 1 5/8 headers get my vote. I honestly don't see any benefit in the long tubes with your application either. BBK makes a great product that is really reasonably priced. Look for a header that has a thick flange that is one piece across the entire length of the cylinder head. Mac products historically don't fit well and have not been known to last very long either. @85rkyboby in your case a 347 with aluminum heads will certainly benefit from 1 3/4 long tube headers!
     
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  4. VibrantRedGT

    VibrantRedGT "STANGNET'S PENGUIN SMACKER"
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    MAC Long tubes are fine but make sure you buy ceramic coated headers. I've had 5 exhaust systems on my car and the MAC Ceramic 1-3/4" with 3" Collector / MAC 3" Prochamber / MAC 3" Catback is still going strong on 347 Stroker. I've done painted, chrome, stainless steel, etc.

    I had 1-5/8" MAC Long Tubes with 2.5" collector on my stock heads then installed them on my GT40X Aluminum heads. They were great for me but wish I had bought them in ceramic instead of chrome. They discolored to purple on the first start up.
     
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  5. 85rkyboby

    85rkyboby Active Member

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    Did you ever have fitment issues @VibrantRedGT ? I have some macs on my current 302. I recently wrapped them, then upon re-installation they didn't fit. I had to bend them with a big ole breaker bar.
     
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  6. VibrantRedGT

    VibrantRedGT "STANGNET'S PENGUIN SMACKER"
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    No, mine bolted right up. Back in 1994 I bought MAC 1-5/8" Equal length headers in chrome and yes I had fitment issues. Before going 1-3/4" Ceramic I had a 2.5" system with 1-5/8" MAC Long Tubes in Chrome and they bolted right up too.
     
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  7. revhead347

    revhead347 I have face herpes.

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    For 85rckyboby, my suggestions are different between a Foxbody and an SN, because they are two different headers, so this doesn't apply to your car. I always think longtubes are a good investment, even with stock heads. I would do the BBK 1519 header which is a 1 and 5/8." I have never had a set of Mac headers that fit right or didn't eventually warp. You have to bend the EGR tube a little to get them to fit. You can still run the ProChamber, you just have to bend it a little. Last time I did a set of 1519s I had to bend the BBK X-pipe to fit anyway. You also have to adjust where the AC liquid line mounts to the inner fender or the headers will melt it. It's an easy mod.

    Kurt
     
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  8. 85rkyboby

    85rkyboby Active Member

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    Ah, my fault didn't even notice the 94-95 Specific Category.
     
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