Undutched

ello all,

for the 4.0 engine, there are 2 part numbers for the M97.74. One is also used for the M97.77.
I'd like to know which one should be used for my 4.0 engine build.

Used for both engines:
99711061991 intake distributor cyl. 1 - 3
99711062091 Intake 4 - 6
M 61B 31503

For 4.0 only:
99711061992 intake distributor cyl. 1 - 3
99711062092 Intake 4 - 6
M 61B 31504 >>

There are no pictures I can find of the differences either, but there is a pretty big price difference as well.

mr.horsepower

There is a smaller intake on the 3.6l and that share the same part on both banks.
The 3.8 and 4.0 have different part numbers.

For a custom 4.0l buildt, I'd check with Dundon Motorsports. They build a pretty sweet intake system for the 997 Mezger. They claim
61whp gain on the 3.6l with they'r headers, airbox and intake manifold kit.

Pats911

My understanding is based on reading alone is that there's a pretty substantial difference in flow capabilities.

If you're in the market, there's a set of runners on ebay, and I also saw this cool custom carbon manifold - no affiliation with either!

Good luck with the decision/build!
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FLT6SPD

I just purchased all of these parts last year, the 997.110.620.92 took some serious sleuthing to obtain the "last one in the system"... Hope that helps

2011 RS4.0 Plenum

Illustration 107-11

#1 qty1 997.110.619.92 Intake Distributor 1-3

#2 qty1 997.110.620.92 Intake Distributor 4-6 currently unavailable

#10 qty2 900.331.056.40 O-Rings

#4 qty1 997.110.116.94 Distributor Tube, Is this that same between GT3, RS3.8, RS4.0? yes same part for both GT3 RS 3.8 and 4.0 and currently unavailable, not the same for GT3 (smaller)

Illustration 107-06

.#12 qty2 997.110.101.92 Intake Manifold, same for left and right? Yes the same left and right

#13 qty12 999.512.349.02 Hose Clamp, same as 999.512.349.01? yes same

#14 qty6 997.110.687.90 Rubber Sleeve only qty 6 required

#16 qty2 996.110.103.93 Gasket only 2 required

#8 qty6 997.605.132.91 Injector only six required

Undutched

Awesome! thanks for posting them up.

The Dundon setup is nice, but also rather expensive. I am located in Germany and I'd have to add another 30ish% for customs and tax, but paying 10 grand for intake alone is just too much.

Great! Thanks for the detailed overview!