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🔧 Upgrade your airflow game — connect with confidence!
The Spectre Performance 9741 Intake Coupler is a precision-engineered reducer designed to connect 4-inch and 3.5-inch outside diameter intake tubes. Crafted from durable PVC and equipped with two stainless steel worm gear clamps, it ensures a secure, leak-free fit. Ideal for naturally aspirated engines, this lightweight and stylish coupler comes in black or red, making it a must-have for enthusiasts seeking reliable, clean airflow connections without turbocharger compatibility.
| ASIN | B001OMK5NA |
| Best Sellers Rank | #478,207 in Automotive ( See Top 100 in Automotive ) #13 in Automotive Performance Hose Fittings & Adapters |
| Brand Name | Spectre |
| Color | Standard |
| Connector Type | Reducer |
| Customer Reviews | 4.5 4.5 out of 5 stars (605) |
| Exterior Finish | Machined |
| Global Trade Identification Number | 00089601974101 |
| Included Components | REDUCER CLAMP |
| Item Dimensions | 6 x 4 x 4 inches |
| Item Type Name | REDUCER CLAMP |
| Item Weight | 0.23 Kilograms |
| Manufacturer | Spectre |
| Manufacturer Warranty Description | 3 Months |
| Material Type | Stainless Steel |
| Model Number | SPE-9741 |
| Number of Pieces | 1 |
| UPC | 089601974101 |
| Unit Count | 1.0 Count |
J**R
excellent product and price point
Needed replacement for my 06 Avalanche, using K&M air filter intake tube. Couldn't find replacement from any part stores, NAPA wanted $65 for 1 ft piece of rubber tube (that i would have to cut down, and didnt include pipeclamps). This adapter came with 2 hose clamps and worked good on my truck, a bargain, will probably order another one to have as a spare
T**Y
Perfect for my 2014 Mustang
I recently put a BOSS 302 intake manifold in my 2014 Mustang 5.0, and I added an Accufab throttle body along with a JLT CAI. I needed a coupling like this in order to connect the TB and CAI of course, and they're two different diameters. This did the trick and everything is connected all snug! Even held up through DynoTune and didn't break loose or anything. Great quality, would recommend.
B**Y
Worked great.
Just what I need for my install and fit perfect.
C**R
Sturdy Coupler
This coupler works very well with people that like to use pvc for engine air supply. It has a nice look and the 4" end fit perfectly over the inlet on the throttle body on my 95 Riviera. The 3.5" end fit snugly over the 3" black pvc pipe in my intake. It could use a bellow in it to ad flexibility. I could not find a coupler with bellows in the listings in Amazon. The price is definitely right.
V**.
Nice boot.
Item is very good quality and it fit like a glove. Super inexpensive for the quality.
J**N
Life saver on an LS install.
I bought this to install a MAF onto a 4" intake tube. Works great when doing an LS swap into a hotrod and building your own air intake which is almost always needed. On LS motors, the throttle body is 4" diameter, and on the 75mm MAF's both sides are 3.5". On the 85mm MAF, one side is 3.625" the other is 4". This will work on the 3.625" side of the 85mm MAF.
T**.
Works great
Works great. Good quality and flexible enough to help create a custom pipe in a tight spot.
C**6
Buy better clamps
The hose clamps are absolute garbage. Even tightening by hand they stripped and locked up
R**Y
Fit as expected and seems to be of good quality. Will have to see how it holds up in the long run but good value for the price.
A**W
Good quality rubber, dimensions as described
A**R
works well
G**E
Perfect fit and price, looks well made
L**E
Fits perfect for my 5.3 mass air flow sensor. Doing a 2000 5.3 swap
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