SKU: 87284343900

MACE ALLOY MAIN CAP GIRDLE FOR FORD MPFI TBI INTECH HP VCT & NON-VCT E-GAS LPG SOHC 12V 3.9L 4.0L I6

Sale price$134.06 Regular price$148.95
Save 10%

Pay in installments of $37.24 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 12 - Aug 17

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

MACE ALLOY MAIN CAP GIRDLE FOR FORD MPFI TBI INTECH HP VCT & NON-VCT E-GAS LPG SOHC 12V 3.9L 4.0L I6This main cap girdle is designed to reduce "capwalk", stop block web flexing and eliminate cracking of the main caps block webs; this is achieved by boxing in the main caps. Our lightweight girdle evenly distributes load and dampens harmonics by bolting the main cap studs together to create a super strong rectangular cage. The brace nearly doubles the main web support area in the engine. Securing the loose end of the main studs provides stability

This main cap girdle is designed to reduce "capwalk", stop block web flexing and eliminate cracking of the main caps/block webs; this is achieved by boxing in the main caps. Our lightweight girdle evenly distributes load and dampens harmonics by bolting the main cap studs together to create a super strong rectangular cage. The brace nearly doubles the main web support area in the engine. Securing the loose end of the main studs provides stability unequaled even by a 4-bolt mains setup.

In addition, due to the close proximity of the main stud girdle to the crankshaft and rods it also aids in stripping oil off of the crank, which in itself yields a net gain in HP.

Fabricated from 10mm thick high strength aluminium, these girdles are a must for high rpm/high horsepower applications where block rigidity is critical.


Contents:

  • 1 X Alloy main cap girdle

Vehicle Fitment Guide


Notes:

  • Spacers from the OEM girdle must be re-used and modified to suit.
  • May require sump modifications on some models.
  • Does not fit AU type alloy sump without modification.
  • Custom length main studs are required. These can be purchased from any authorized ARP dealer.
  • The image is for illustrative purposes only
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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
SKU: 87284343900

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 13 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
P
Verified Purchase
PARRIS CHARGOIS
Chelsea, US
★★★★★ 5
This shirt brings mens dress shirts to a new level. My husband wears it with slacks or jeans.
Color: Army Green, Size: X-Large
Kudos to whoever designed and manufactured this shirt! It is stylish with interesting details. It can be gently washed in your washing machine and dried on a warm setting. The fabric is next level, feels like cotton with a tech stiffness to it. It has a dull sheen. I'd say "give it a shot". I ordered one and it was sooo handsome that I got my husband some other colors. Bonus.....The cut is generous enough to make a bit of a paunch disappear.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
R
Verified Purchase
Ron
San Leandro, US
★★★★★ 5
Well-made shirt.
Color: Light Grey, Size: Small
Material doesn’t feel light or flimsy. Very soft and fits well. Not too loose or too tight. Plan to purchase another one down the road.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
R
Verified Purchase
Rose
Boise, US
★★★★★ 5
Fit and color are spot on
Love the shirt and the material is great! It washes and iron well. The fit was perfect on my husband and he really liked it as well. We will definitely be ordering more colors. We got the blue color and it is just as pictured. Love the strip also it really adds to the look.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
C
Verified Purchase
CP
Whiting, US
★★★★★ 3
Shirt Without Buttons
Color: Navy Blue, Size: 3X-Large
I bought about seven of these shirts. They are soft and very comfortable to wear. However, it appears to be a major quality control issue with these shirts, regardless of the color. The buttons keep falling off the shirt on their own. Even when I wash them in the washing machine, on delicate. And the most frustrating thing about the whole ordeal, I have no extra buttons to replace those that fell off. I have shirts that I have had for years, and the buttons are still on the shirts. What's more, they each have extra buttons, one small and one regular size. I guess since the shirt is made in China, they make money by using low quality thread and not putting any replacement buttons. You be the judge, to buy or not to buy, if you can deal with the buttons coming off and nothing to replace them with. The choice is yours.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2026
S
Verified Purchase
SiSi
Waukegan, US
★★★★★ 5
Very nice fit.
Color: Navy, Size: X-Large, Color: Navy, Size: X-Large
This really looked good on my fiancé, who is 6'1 and has a long torso and broad chest and shoulders. It was looser in the midsection. I got him an XL.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026

recommand products