{"product_id":"holley-tri-power-six-pack-secondary-diaphragm-135-6","title":"Holley Tri-Power Six Pack Secondary Diaphragm 135-6","description":"\u003cul\u003e\n\u003cli\u003eDirect replacement vacuum secondary diaphragm for Holley Six Pack and Tri-power outer carburettors\u003c\/li\u003e\n\u003cli\u003eFits both front and rear outboard carburettors on Mopar 440 and 340 engines\u003c\/li\u003e\n\u003cli\u003eAlso suits GM Chevrolet Tri-power systems including Corvette applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis vacuum secondary diaphragm is designed for the outboard carburettors used in Holley Tri-power and Six Pack systems. On these 3x2 arrangements, the centre carburettor handles primary running while the front and rear units operate as vacuum-controlled secondaries, opening progressively under load. A faulty diaphragm is one of the most common causes of poor Six Pack performance, hesitation, or failure of the outer carburettors to engage. This replacement unit restores proper actuation on both the front and rear carburettors and is suitable for Mopar Six Pack engines as well as GM Chevrolet Tri-power applications including late 1960s Corvettes. It matches all known Holley outboard carburettor list numbers that use this style of vacuum pod.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct: Holley Tri-Power \/ Six Pack Secondary Diaphragm\u003c\/li\u003e\n\u003cli\u003eApplication: Outboard (front and rear) vacuum-operated carburettors\u003c\/li\u003e\n\u003cli\u003eVehicle Fitment: Mopar 440 and 340, GM Chevrolet Tri-power including Corvette\u003c\/li\u003e\n\u003cli\u003eCarburettor Operation: Vacuum secondary\u003c\/li\u003e\n\u003cli\u003eCompatible Holley List Numbers: R3659, R4365-1, R4382-1, R4383-1, R4393-2, R4394-2, R4671, R4672, R4789, R4790\u003c\/li\u003e\n\u003cli\u003eFuel Type: Petrol (gasoline)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInclusions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement vacuum secondary diaphragm\u003c\/li\u003e\n\u003cli\u003eCorrect sealing lip for Holley outboard pods\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":46678741123235,"sku":"HOL-135-6","price":85.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/6940\/7395\/files\/hol-135-6-tripower-secondary-diaphragm-2.jpg?v=1766489183","url":"https:\/\/crankys.com.au\/products\/holley-tri-power-six-pack-secondary-diaphragm-135-6","provider":"Cranky's Performance","version":"1.0","type":"link"}