SKU: 80703808391

Stillen 2003-2007 Infiniti G35 / 2003-2008 FX35 Z-Tube [Without Intake] - 403235

Sale price$77.32 Regular price$85.91
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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23

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Description

Stillen 2003-2007 Infiniti G35 / 2003-2008 FX35 Z-Tube [Without Intake] - 403235Product Features Roto Molded Plastic Tubing Like the 350Z Isolates Incoming Air From Engine Heat Use With Stock Airbox or for Maximum Gains Add the STILLEN Intake Does Not Include Intake CARB Exempt STILLEN Z Tube for 2003 2007 Infiniti G35 coupe, 2003 2006 G35 sedan, 2003 2008 Infiniti FX35 [S50] (without Filter No Heat Shield) 403235 Benefits Direct Bolt on replacement GAIN 11 Horsepower Improved mileage per gallon (MPG)* Hassle free at smog check,

Product Features

  • Roto-Molded Plastic Tubing Like the 350Z
  • Isolates Incoming Air From Engine Heat
  • Use With Stock Airbox or for Maximum Gains Add the STILLEN Intake
  • Does Not Include Intake
  • CARB Exempt

STILLEN Z-Tube for 2003-2007 Infiniti G35 coupe, 2003-2006 G35 sedan, 2003-2008 Infiniti FX35 [S50] (without Filter No Heat Shield) - 403235

Benefits

  • Direct Bolt on replacement
  • GAIN 11 Horsepower Improved mileage per gallon (MPG)*
  • Hassle free at smog check, with the CARB Exempt design
  • Increase airflow and filtration efficiency by replacing factory panel filters with high performance cone or barrel air filters with larger surface area.
  • BEST airflow speed by replacing restrictive intake tubing with larger diameter tubing.

*Results May Vary!

The factory intake tracts on the third gen Infiniti G35 V35 and first gen FX35 S50 were not designed for maximum performance. The Nissan 350Z, which shares its engines with both the V35 Infiniti G35 and FX35 vehicles, and are equipped with a much more efficient intake tube that breathes easier and cooler than its Infiniti counterparts.

The STILLEN Z-Tube is so efficient that it is a direct replacement of the OEM design from a Nissan 350Z, putting out enormous power gains of 11 horsepower!

Made of a roto-mold plastic, the Z-TUBE intake duct offers excellent insulation properties, repelling heat coming off the surface of the engine. As a result the cold intake power increased dramatically. The maximum gains are only achieved when matching up with a STILLEN Hi-Flow Intake filter, part# 402835 , that also includes a polyurethane heat shield for a true cold air intake.

The Venturi ring acts as a velocity stack, speeding up and directing the airflow into the intake chambers, producing a noticeable power bump. The Intake System also lends a more aggressive tone to theV35 G35 and S50 FX35 when pressed, but remains unobtrusive at cruising speed.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 80703808391

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4.3 ★★★★★
Based on 8 reviews
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Product Reviews
C
Verified Purchase
Cassandra
Lowell, US
★★★★★ 4
Did not fit my car
Style: HCC1817-X
The product looks good and does fit a 2024 Hyundai Tucson hybrid.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
S
Verified Purchase
SeanEllAZ
Port Orchard, US
★★★★★ 5
Health, Eco, AND Econo friendly.
Style: HCC2128-X
40K+ miles o my 2020 Ranger. Thought I’d replace the CAF (cabin air filter.) Holy c__p. The original factory filter was clogged with dust, mesquite seeds, Palo verde droppings -YUCK. This reusable filter improved airflow immensely, plus the cabin feels fresher. Quite a bargain compared to the major brand reusable CAF (K_N) too, or pulling clogged filters, throwing them in the trash and buying a new disposable filter to install. I’m looking forward to pulling this in a month and seeing what it kept out of my breath, washing it, and reinstalling it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 23, 2025
M
Verified Purchase
Michelle Rohrbach
Whiting, US
★★★★★ 5
Great filter
Style: HCC2146-X
My husband said this filter was high-quality, he was quite impressed. We’re not crazy about the washable kind normally, so we’ll have to see how it holds up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
S
Verified Purchase
Sandwichmaker
Massapequa, US
★★★★★ 5
Filter Fits Properly and is an Easy Install
Style: Particulate Media
Though not made for or by Honda, this filter is inexpensive and looks like it's capable of filtering the air coming into the passenger compartment of our 2012 Honda Fit. The primary difference between this unit and the original filter supplied by Honda is that the original unit has some "ribs" that help to keep the pleats separated attached to the top of the pleats. The item I received lacks that, but it appears to me that the pleats are strong enough on their own for the intended purpose. The filter fits into the frame as it should. Replacing this filter is incredibly easy and requires no tools: you empty the glove compartment, compress it's sides inward so that the rubber stops on either side clear the dash, allowing the glove compartment to drop out an extra 4-5 inches. Then, you can see and reach the cover for the cabin air filter, which is secured by latches on each side. Remove the cover and slide out the filter and frame. Replace the air filter element, which just sits in the frame, replace the frame and cover, and compress the glove compartment sides again to put it back in place. Put your stuff back in the glove compartment and you're done. In a few minutes you've saved significant dollars over the cost of having this done in the shop. Congratulations! The engine air filter is equally easy to replace in the Fit, though for that job I prefer to use a Honda OEM part. Edit: I thought I should add a reminder to install the filter in such a way that the air flow indicator is the same as the one that you remove, i.e. do not put it in upside down. If I remember correctly, air flows from above to below in the Honda Fit. Also, currently, the price for this item is not competitive.
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Reviewed in the United States on December 21, 2014
D
Verified Purchase
Don
Birmingham, US
★★★★★ 5
Easiest to install so far
Style: HEPA
So the 2018 Honda Odyssey apparently checks the air flow and after a certain point it determines the cabin air flow is less than desirable. At least this this is what I’ve gathered after talking to my dealer. Buying a thick filter may not be better. This was the easiest filter to install. I didn’t have to gingerly coax it In without collapsing the filter. It fit easily and I didn’t have to cut it. Pro Tip: Write the date of install in case your dealership says “well cabin air flow is blah blah blah.” Just tell them to check the date. You should get 6-12months on a filter. My dealership wanted to charge a ridiculous amount for what is literally a 2 minute job. Decent filters will cost around $20. Thicker isn’t better. It all depends on how much crap you have in your glove box. And how much crap is in your air. It might take longer to get all the receipts, first aid kits, tick prevention kits, headlights for the Scouts that forgets theirs, oh that there’s that Leatherman and Mylar blanket is… The job entails emptying the glove box, who’s keeps gloves in these? Press the tabs to drop the box and then Voila there is the filter. It’s really that easy. Ok pull the cover off and pull the old filter. Unless you live in a really dusty environment or have squirrels that are destined to ruin your life there shouldn’t be any real mess . Pull it out and put this in. There’s air flow arrows but even if you did it backwards the van isn’t going to explode in a ball of flame, fueled by the forgotten Cheerios under the seat. Relax, you did it. The world still turns and you’re good to go. Now it’s time to think about the engine air filter. You can do it. It’s easy but the clips can be a pain so it’s better to grab an adult beverage before, just in case.
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Reviewed in the United States on December 11, 2021

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