What sort of power gains will I see with these mod's on a bf xr 6

1 pacemaker headers

2 high flow cats

3 20% underdrive pulley custom tune

4 air intake

im gunna have a stab at 170 rwkw.

I've got a question how much is a 20% underdrive pulley? are there any disadvantages in using one?

ive had mine on for a while and nothing has gone wrong or felt different, the steering was vibrating a bit but only for about a few hours....and u can get them from ebay

I got one from autobarn for like 350.. I think for a NA there is sumthing like 9rwkw

I would also like to know how much power you would gain from those mods aswell.

I was thinking: exhaust, typhoon intake, under drive pulley just to make it a little more driveable

If I do these mods will there be a loss in fuel economy or driveablity? I'm assuming I'd need a tune to get everything running properly

Edited April 21, 200917 yr by Woggster

Even without the tune, ive felt a fair bit of a difference in my car, I havnt had it dynoed yet so I cant give you an accurate figure, you can see my mods in my signature.. but your right, to get everything working to its full potential, not to mention improving fuel economy, you should get a tune and a custom tune at that.

Im waiting till I get off my Ps!!

Cheers.

yea thanx. I was thinking of doing symilar mods to wat u have in your signature

What sort of power gains will I see with these mod's on a bf xr 6

1 pacemaker headers

2 high flow cats

3 20% underdrive pulley custom tune

4 air intake

Hi all

Just got the car back from horse power factory.

Flashed tuned,redback 2.5 cat back, hpc 4490 pacemaker headers, 2.5 bullet high flow cat, 20% under drive, air intake, k&n filter.

172.3 rwkw.

Very happy with the result

between 170 and 180 rwkw