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Old 06-21-2014, 04:48 PM   #1
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Anyone know bolt size?

Just installed the BBK shorties in my 3.7. Was thinking about replacing the studs/nuts with a set of Stage 8 Locking fasteners. Doesn't look like they have a kit listed so I would just need to pick up the right size. Anyone know the thread size size and length I should get?

Thanks

Steve
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Old 06-21-2014, 05:07 PM   #2
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How was the install? I have some I'm going to be doing soon.
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Old 06-21-2014, 05:50 PM   #3
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It was awful. My car has 53,000 on it so it wasn't a fresh engine. Manifold to cat pipe bolts took forever to remove. Tons of penetrating oil and a fairly large breaker bar. Stud came out of the block and couldn't get the nuts off some of the studs. The install went quickly. 80% of the time was on the removal and only 20% for the install. Sound is sweet with my Roush axle backs. Sounds great at idle, meaty on acceleration and pretty bad *** at WOT. You'll love them.
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Old 06-21-2014, 06:04 PM   #4
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Quote:
Originally Posted by Red89 View Post
It was awful. My car has 53,000 on it so it wasn't a fresh engine. Manifold to cat pipe bolts took forever to remove. Tons of penetrating oil and a fairly large breaker bar. Stud came out of the block and couldn't get the nuts off some of the studs. The install went quickly. 80% of the time was on the removal and only 20% for the install. Sound is sweet with my Roush axle backs. Sounds great at idle, meaty on acceleration and pretty bad *** at WOT. You'll love them.

Yea bbk short headers are a pain to install.. It's mainly the design.. The macs look a lot easier to install IMO.. And the macs look like they have way better quality.. My bbk's came rusted.. I am not to sure on bolt size tho, sorry bud. I just reused the ones It came with
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Old 06-21-2014, 07:39 PM   #5
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Quote:
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It was awful. My car has 53,000 on it so it wasn't a fresh engine. Manifold to cat pipe bolts took forever to remove. Tons of penetrating oil and a fairly large breaker bar. Stud came out of the block and couldn't get the nuts off some of the studs. The install went quickly. 80% of the time was on the removal and only 20% for the install. Sound is sweet with my Roush axle backs. Sounds great at idle, meaty on acceleration and pretty bad *** at WOT. You'll love them.
I am know convinced that the mileage has nothing to do with the bolts. My car had 8100 miles on it and my bolts where so tight that they would make the pope curse lol
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Old 06-21-2014, 08:57 PM   #6
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I am know convinced that the mileage has nothing to do with the bolts. My car had 8100 miles on it and my bolts where so tight that they would make the pope curse lol
Ford was a little liberal in their use of Loctite lol. Learned that with the LTs and most recently rotor swap.
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Old 06-21-2014, 09:03 PM   #7
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Ford was a little liberal in their use of Loctite lol. Learned that with the LTs and most recently rotor swap.
Alittle off topic but are you satisfied with your pypes exhaust, sound, quality
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Old 06-21-2014, 09:09 PM   #8
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Alittle off topic but are you satisfied with your pypes exhaust, sound, quality
Yeah, I like it. Before the LTs it got a little buzzy at ~2k RPM but after, it deepened the tone A LOT. Very aggressive rumble and growl up until around 3k. It gets stupid loud and a bit raspy after that point but I like it. Still maintains a tone unlike Roushes or ATAKs which are just loud for the sake of being loud.

I might consider some resonators to bring down some of the rasp but no drone at the moment. Catted X-pipe helps, I definitely wouldn't got catless. This engine gets raspy enough and High-flow cats vs Catless is almost pointless. No real gains from catless.


But to kind of keep things on topic: At least you'rs wasn't an '11. Those bolts may have as well been welded as all the rust I had to break through
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Old 06-21-2014, 09:15 PM   #9
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I have owned 15 mustangs over the years in all different flavors and this midpipe by far was the worse. I couldn't imagine what yours where like.
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Old 06-21-2014, 09:37 PM   #10
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I have owned 15 mustangs over the years in all different flavors and this midpipe by far was the worse. I couldn't imagine what yours where like.
Lots of quality time with the breaker bar/cheater pipe
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Old 06-21-2014, 09:49 PM   #11
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I used this to install my shorties. Fits perfectly in 3.7 V6.
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