Changes/Mods to your car or truck over the winter

[John4cam]

Installed Kooks axle backs today. Sounds incredible, pretty tame at idle. Gotta get the resonators cut out or spring for OAPs.

I never knew cooks did anything other than headers...thats interesting. Could you do a sound clip?

[juice_man_86]

I have the kooks axle backs on my 2014 5.0. They're real mild. I removed the resonators and it sounds awesome now. Not too loud either.

[Mark Aubele]

I never knew cooks did anything other than headers...thats interesting. Could you do a sound clip?

Hard for me to make a good one of my car, but here is the one I found that made me buy the axlebacks, same mods as me, long tubes and off road x, kooks axlebacks.

[1320goat]

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New setup. Can't wait to get to the track

[John4cam]

Hard for me to make a good one of my car, but here is the one I found that made me buy the axlebacks, same mods as me, long tubes and off road x, kooks axlebacks.

That car sounds evil inside the cabin.

[yeahloh95]

do the kooks axle backs have any drone I am on gt500s now and want something a little louder I have kooks headers and x pipe now and no resonators

[Mark Aubele]

do the kooks axle backs have any drone I am on gt500s now and want something a little louder I have kooks headers and x pipe now and no resonators

Not that I have noticed but I have barely driven it. Put them on the weekend before we got the snow. Similar combo as you LTs and off road x but I haven't had the resonators cut out yet.

They really aren't that loud though. I was pretty surprised, hope I can hear it with a helmet on.

[SK360]

Heres my one big mod for the year... lol

[Pure Stock]

Installed Kooks axle backs today. Sounds incredible, pretty tame at idle. Gotta get the resonators cut out or spring for OAPs.

When choosing primary diameter for headers I was told by a very reputable shop that the Kooks mid-length 1 7/8" would create a loss of 20 rwhp over the 1 3/4" on a stock long block sans cold air and tune. When asked if dyno comparisons were available they immediately said just believe them it's fact.

[Mitternacht]

Lowered the TDi with H&R sport springs and installed gauges; that's about it.

[yeahloh95]

When choosing primary diameter for headers I was told by a very reputable shop that the Kooks mid-length 1 7/8" would create a loss of 20 rwhp over the 1 3/4" on a stock long block sans cold air and tune. When asked if dyno comparisons were available they immediately said just believe them it's fact.

i was glad you talked me into the 1-7/8 headers they work awesome

[PaxtonShelby]

^^^^ I'm confused... Isn't that the opposite of what Joe said?

[yeahloh95]

they told him that but had no data to back up the claim another shop showed they make more power with bigger headers

[RUTHLESS]

Found the issue with the Cobra.

Ouch! Having the shop weld it up and surface the heads.
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Block is fine.
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All is good in the lower end.
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[ERR0RMACR0]

Found the issue with the Cobra.
Ouch! Having the shop weld it up and surface the heads.

Can't see clearly in the pic--it looks like the head gasket blew out on the top left of a cylinder...is that just a mark or did a piece of something hit right there? Sorry to hear about your issue.

[ERR0RMACR0]

Car is back in the shop now--trans is out and will be on its way to be rebuilt on Monday. Really excited to get some updates on the trans and finally not slip on the 1-2 shift. Should be able to finally run boost on launch, rather than sitting in vacuum. I'll probably only run 1-2 psi, but it should help with getting out of the hole a bit better.

[RUTHLESS]

Shop is saying spark blow out not a lifted head since it torched the head and gasket in that area. Piston and bearings look good so there was not a detonation issue.

[ERR0RMACR0]

Good to hear--glad the bottom end is intact for you. Good luck with getting it back together.

[Pure Stock]

i was glad you talked me into the 1-7/8 headers they work awesome

[Mark Aubele]

I bought 1 7/8 as well.