★★★★★ 2
Quality control lacking
One tee conector was missing. Nothing avaliable locally that fits.
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Reviewed in the United States on July 13, 2025
GSC P-D Porsche GT3 CUP 996/997 Manganese Bronze STD Style Intake/Exhaust Valve Guide - SET OF 12
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
GSC P-D Porsche GT3 CUP 996/997 Manganese Bronze STD Style Intake/Exhaust Valve Guide - SET OF 12SKU: 3997 12 GSC P D Porsche GT3 CUP 996 997 Manganese Bronze STD Style Intake Exhaust Valve Guide SET OF 12 Upgrade your Porsche 996 997 GT3 Cup engine with GSC Power Division manganese bronze STD style intake and exhaust valve guides sold as a set of 12. These guides fit the high revving 3. 6L Mezger engine in GT3 Cup race cars providing reliable valve stem support during extreme track conditions. Precision engineering ensures minimal wear and
Quick Dispatch:
Your GSC P-D Porsche GT3 CUP 996/997 Manganese Bronze STD Style Intake/Exhaust Valve Guide - SET OF 12 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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You'll receive a tracking link by email once your GSC P-D Porsche GT3 CUP 996/997 Manganese Bronze STD Style Intake/Exhaust Valve Guide - SET OF 12 ships.
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4.3 ★★★★★
Based on 118 reviews
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Product Reviews
★★★★★ 1
It doesn’t stay in
The pipe keeps coming out. Not worth the money. Not sturdy to hold a top table.
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Reviewed in the United States on February 20, 2024
★★★★★ 2
Good finish, poor hardware.
Set screws are poor quality and are sometimes powdercoated on the exposed threads. Leads to striped hex sockets and inability to tighten properly.
Durable finish as evidenced by no visible damage after throwing parts across the shop in frustration.
Ended up running self tapping screws thru parts to complete assembly.
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Reviewed in the United States on February 26, 2024
★★★★★ 1
Kinda flimsy…
Thought the assembly was metal, it’s some kind of PVC.
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Reviewed in the United States on September 22, 2025
★★★★★ 5
Shelves
Style: 5-Tier Shelf Brackets, Hardware Only
Great shelves, strong and they look great.
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Reviewed in the United States on May 2, 2026
