3.9 v8 exhaust options

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Stuvy
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3.9 v8 exhaust options

Post by Stuvy »

After having a browse on here I’m at a bit of conflict as to what exhaust system I need

Mine is a 3.9 efi v8 r reg 1997 so precat.

I don’t want it so loud it’s offending but I was thinking a straight mid pipe and leave the rear resonator in place

Will headers make a massive difference or just up engine bay temperatures and affect the starter motor



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JSF55
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Re: 3.9 v8 exhaust options

Post by JSF55 »

I run the stock sd1 exhaust manifold, downpipes and Y piece on mine, welded on a 2" connector and a single jetex mid size box and straight out the back on the pop, sounded just right to me 8)
So thats where it went !

Stuvy
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Re: 3.9 v8 exhaust options

Post by Stuvy »

Was that with efi?

All the Landy know it alls day the efi needs a standard exhaust as it bla bla balanced

Is this true or just like the myth of the person putting there motor home on cruise control and making a cup of tea

garrycol
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Re: 3.9 v8 exhaust options

Post by garrycol »

For the 3.9 - tuned extractors do little extra over the standard manifold. Gains are to be made in the exhaust system aft of the manifolds - slightly larger diameter pipes and free flow mufflers make a noticeable improvement.

Stuvy
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Re: 3.9 v8 exhaust options

Post by Stuvy »

Thanks for the reply

Iv ordered a straight mid pipe so will see how it goes

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JSF55
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Re: 3.9 v8 exhaust options

Post by JSF55 »

I ran carb, rover efi, and fast efi on it, but the exhaust never seemed to mind what I was doing :lol:
So thats where it went !

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