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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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Description
MUSTANG GT500 2007-2009 WHIPPLE DS STAGE 4 open filter inlet whine mod kit 75% WHINE INCREASE SKU 155Increases the in cabin rotor sound by up to 75% Foster SC Stage 4 Kit works on both closed air box and open filter or aftermarket CAI systems. Drilling through the firewall required. Connects from inlet pipe through the OEM sound tube location. Sealed sound tube with special diaphragm cap installed on end of sound tube inside cabin. For drivers side supercharger inlets setups.
- Increases the in-cabin rotor sound by up to 75%
- Foster SC Stage 4 Kit works on both closed air box and open filter or aftermarket CAI systems.
- Drilling through the firewall required.
- Connects from inlet pipe through the OEM sound tube location.
- Sealed sound tube with special diaphragm cap installed on end of sound tube inside cabin.
- For driver’s side supercharger inlets setups.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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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]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 4
Measure Carefully
Color: Champagne, Size: 12
Great quality, handsome style with a modern color, and fit. Just be aware if your little guy is smaller in stature the arms may be a bit long. Measure carefully.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 1, 2026
★★★★★ 5
Great little boy blazer
Color: Dark Blue, Size: 8, Color: Dark Blue, Size: 8
Too adorable and good quality. My picture doesn't do it justice. A nice dark blue with a subtle pattern. Will go well with many outfits. Fits well and not too snug with a shirt or light sweater underneath.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 2, 2026
★★★★★ 5
Long sleeves
Color: Dark Brown, Size: 14
Looks so good on my boy. I bought a little big (size 14 for my 11 year old) and turned the sleeves in a couple inches, which requires moving the buttons, but I think he might get a couple years wear as he is probably about to hit a height growth spurt. It doesn't look cheap - the material is thick enough to drape nicely.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Great Quality!
Color: Champagne, Size: 8
I purchased this blazer for my seven-year-old grandson. Great quality for the money. Perfect fit.
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Reviewed in the United States on January 8, 2026
★★★★★ 5
Surprising quality, excellent attention to detail, and satisfying shopping experience
Color: Light Grey, Size: 4
This shopping experience was fantastic. First of all, its quality definitely exceeded its price, and the texture is very good
Very thoughtful, great attention to detail, absolutely standard suit!!!
What I love the most about it is its fabric. It makes me feel at ease when my child wears it, and it won't be uncomfortable to wear. It's very child friendly
I have no doubt about the size, its waistband is adjustable, at least for my son, it fits well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 23, 2025
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