What size maf pipe with 3.5" maf & 4" turbo?

[BLACK6PACK]

My brother just bought a 3.5" ls1 maf and has a 70 GTQ turbo with a 4" inlet. What size maf pipe fits without messing around with throttle body and plenum stuff? Does anyone make a 3.5" maf pipe? Do you need a plenum spacer and IAC relocation kit to run a 4" maf pipe?

Anybody run one of Full Throttles new chips that are like the Max Effort? Just curious cuz I think he's going to need help. He has a new beast in the works.

 

[2QUIK6]

Check out this site http://www.buickgn.com/mafpipes3.5INCH.htm
You'll need an IAC relocation block.

 

[MSDGN]

I have one of Marks's 4" MAF pipes on my 70GTQ...has an adapter for the 3.5" MAF and on the end I have an S&B 14" filter with 3.5" opening...

 

[BLACK6PACK]

Thanks guys. Did either of you have any problems with the clearence? I don't know if the hemco is any taller, but he'll be running a hemco.

 

[2QUIK6]

Thanks guys. Did either of you have any problems with the clearence? I don't know if the hemco is any taller, but he'll be running a hemco.

I'd didn't have any clearance probs, but I have the IAC relocation block, the 3.5" MAF and 3" uppipe...no plenum spacer but there was plenty of hose with the 3" uppipe I got from Mark that it would not have been a problem.

 

[donZ]

AN04 4'' ALUMINUM LONG NO MAF
Fits 4" turbos without MAF sensors. Has smooth bends and
cut it where you want the maf,
http://www.aggressiveauto.com/

 

[MSDGN]

I have a Precision plenum with PP...70 MM Accufab TB...3 inch pipes going into TB from front mount...the 4" MAF pipe is a tight fit but no clearance problems...I did have to use IAC relocator....