Headers/ypipe question

[Kingmarchil]

Hello all i have a '16 yukon denali with magnaflow 3.5" catback and volant CAI 380 rwhp atm wanting to push over 400+ rwhp

Im looking to install kooks headers (28602401) and catted ypipes (28613200) but i want to know will it fit or the 8speed ypipe has different placement?

And when i search for headers they're mostly for silverado/sierra.. are all trucks and suv 6 or 8 speed the same down under and all ypipes fit?

 

[Kingmarchil]

Anyone?

 

[NORCAL SS]

i have 1 7/8 arh headers and non catted y pipe and installed and sold many. I dont use kooks anymore the arh has better clearances. PM me My truck makes 565/573 on pump 91 gas and 7.5 psi on whippple 2.9

 

[2016YUKONSLT]

i have 1 7/8 arh headers and non catted y pipe and installed and sold many. I dont use kooks anymore the arh has better clearances. PM me My truck makes 565/573 on pump 91 gas and 7.5 psi on whippple 2.9

Can you get the ARH for a 5.3L?

 

[NORCAL SS]

Yes I get it all I'm a dealer forcthem

 

[Jorgez28]

Are there any gains with a header and a y pipe and a stock exhaust? Do you need a tune after a header install?

 

[Kingmarchil]

Are there any gains with a header and a y pipe and a stock exhaust? Do you need a tune after a header install?

The new gen exhaust manifold are high flow and will not net that much hp, the real restriction lies in the ypipe which is where you get the most hp gains but since you'll upgrade to an aftermarket ypipe might aswell get the headers

Ive seen 20-25 rwhp gains with headers+ypipe.

And yes you need the tune, otherwise your car will run rich and get worse mpg and possibly less hp than stock.

 

[NORCAL SS]

i gained a solid 25-30 rwhp on my escalade with the headers. no cats.

i have the full magnaflow 3.5 cat back also

 

[2016YUKONSLT]

i gained a solid 25-30 rwhp on my escalade with the headers. no cats.

i have the full magnaflow 3.5 cat back also

Were these gains with or without the whipple?

 

[NORCAL SS]

naturally asperated look 20 rwhp to 25 rwhp.