Ok… Question on bbk shorty headers

[WildHorse]

Anyway I could get away with a 3 inch Catt?

Any competent exhaust shop can make those 3" cats work.

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[GT 550]

not interested in the 1k price a long with needing to also buy a mid pipe

@Kingofhearts is the car tuned yet? If budget is a consideration you'll get vastly greater bang for buck from tuning a 15 than you will from headers.

 

[WildHorse]

Any competent exhaust shop can make those 3" cats work.

Example ;

 

[Kingofhearts]

Any competent exhaust shop can make those 3" cats work.

thanks, I’ll have to locate some, so far I’m only seeing catts for long tubes.

@Kingofhearts is the car tuned yet? If budget is a consideration you'll get vastly greater bang for buck from tuning a 15 than you will from headers.

Yeah I’m tuned, 93 and E85

 

[GT 550]

Would be really interesting to get a dyno run before and after modifying the stock exhaust as shown. Not sure if anyone has done that yet.

 

[WildHorse]

thanks, I’ll have to locate some, so far I’m only seeing catts for long tubes.

If you wanna make horsepower & pass emission, HJS universal cats are the way to go.

 

[Kingofhearts]

Would be really interesting to get a dyno run before and after modifying the stock exhaust as shown. Not sure if anyone has done that yet.

I wish it could be me to help out in this area, I’m not close to any dynos.

If you wanna make horsepower & pass emission, HJS universal cats are the way to go.

Thanks m8, I’ll look into both routes ( headers or hi flow cats) to see which option would be great for me.

 

[slime_bullet]

Example ;

Somebody doing some creaform on that cat

 

[Kingofhearts]

Already have an 18+ IM?

this is next, looking at the ported options. Though someone has reached out and told me, for what I use the car for the new f150 would be perfect. Idk.

 

[Kingofhearts]

Personally would go straight to the ported 18+. The gains would be massive compared to the exhaust route. The sound will make it sound faster though.

Lol trust me, I’m buying that next month lol.

 

[Basspro302]

The oxygen sensor bung on that bbk is welded in the wrong position. Its going to kill the wideband o2s lol

 

[K4fxd]

Personally would go straight to the ported 18+

If you like to rev the engine.

 

[Kingofhearts]

If you like to rev the engine.

I believe stock reb limiter is around 6.5k right? I barely touch that. If ever. Even on my longer highway pulls, I’m normally done by the time I get to 6k

 

[silverbullet85]

Yes Sir. With a x/h-pipe make sure the opening on the inside is well defined. I've seen H-pipes that the hole wasn't even a inch across. For cats, 3" in/out minimum, and get rid of anything else that necks down.

Unless your entire exhaust system is 3 in all the way to the tips then 2 1/2 is fine.

 

[K4fxd]

I believe stock reb limiter is around 6.5k right?

Stock is 7000, if you go to the 18 mani you will need to spin it to 7400 to see any results.

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