baxj89

What are some good bolt ons or upgrades 2 do 2 a stock 89 4.0 is there a cold air kit throttle body spacer????? Need help don't want 2 waste money need stuff that works

TheJerm

Try searching around forums, there have been many threads about that.

Basic list:
99+ intake (if you have an older one)
60mm TB
header and exhaust system
neon injectors
intake

Bustedback

Then don't waste your money or time with spacers and cold air intakes. If you want more horepower that you can feel you need to go inside the engine and do some work. Better cam, up the compression a little, bore and stroke it, etc. Maybe your engine is just tired and in need of a rebuild.

Hunter White

So is a throttle body spacer a waste of time and money? I was thinking of getting one for my 93 XJ. It's got a good engine and no problems, but I am slowly beefing it up from stock and that was on my "to do" list.

Bustedback

You won't feel any difference in the seat of your pants, use the money for a tank of gas instead.

baxj89

My planns are 2 eventually make it a 4.7 stroker its a healthy 89 4.0 with 80xxx something miles on it was just seeing what's out there that would be worth investing in lol

freegdr

neon injector upgrade will improve throttle response and idle ,header and free flowing exhaust ,cold air intake will let it breath a little better other than that stroker will improve greatly but its costly

mudfrog

Give it a good tune up as well. When I went to an MSD coil and larger plug wires I noticed a much smoother idle, better throttle response and it pulls hills much better than before.

Thexjfiles

Check my thread under the for sale section: Bored throttle body....and see what all my customers have to say about it.

mudfrog

Been debating on this and a 99+ intake, supposedly it's a nice little bump on the OBDI 4.0's.

freegdr

renix ?

baxj89

Xj files I will and freegdr I want 2 get rid of my air box and go with a cone type filter what would I do withthe vacum lines and such which ones would I plug would I have 2 plum some into the piping.

freegdr

hard to find ones for renix i did this, pep boys around 35 dollars total

baxj89

How do u tell the difference between a renix and a regular??? And what did u do about all the lines did u plug em fab them into ur duct work ???

freegdr

i plugged the line that went to the lid the big line drilled a hole in tube and inserted as you see 87 thru 90 are renix model xj